Central Thesaurus

Taxon Search
Organism
  Plantae
      Tracheophyta
            Magnoliopsida
                    Asterales
                            Asteraceae
                                     Acamptopappus
                                             Acamptopappus shockleyi
                                             Acamptopappus sphaerocephalus
                                               Acamptopappus sphaerocephalus var. hirtellus
                                               Acamptopappus sphaerocephalus var. sphaerocephalus
                                                     [Aplopappus sphaerocephalus]
                                     Acanthospermum
                                             Acanthospermum australe
                                                   [Acanthospermum xanthioides]
                                                   [Melampodium australe]
                                             Acanthospermum hispidum
                                             Acanthospermum humile
                                                   [Melampodium humile]
                                     Acanthoxanthium
                                     Achaetogeron
                                     Achillea
                                             Achillea ageratum
                                             Achillea alpina
                                               Achillea alpina subsp. multiflora
                                                     [Achillea multiflora]
                                             Achillea borealis
                                             Achillea distans
                                                   [Achillea dentifera]
                                               Achillea distans subsp. distans
                                                     [Achillea dentifera]
                                               Achillea distans subsp. stricta
                                                     [Achillea magna]
                                             Achillea filipendulina
                                             Achillea ligustica
                                             Achillea millefolium
                                               Achillea millefolium var. alpicola
                                                     [Achillea alpicola]
                                                     [Achillea fusca]
                                                     [Achillea lanulosa subsp. alpicola]
                                                     [Achillea lanulosa var. alpicola]
                                                     [Achillea millefolium var. fusca]
                                                     [Achillea subalpina]
                                               Achillea millefolium var. arenicola
                                                     [Achillea arenicola]
                                                     [Achillea borealis subsp. arenicola]
                                                     [Achillea borealis var. arenicola]
                                                     [Achillea millefolium var. maritima]
                                               Achillea millefolium var. borealis
                                                     [Achillea borealis subsp. typica]
                                                     [Achillea millefolium subsp. atrotegula]
                                                     [Achillea millefolium subsp. borealis]
                                                     [Achillea millefolium var. fulva]
                                                     [Achillea millefolium var. parviligula]
                                                     [Achillea millefolium var. parvula]
                                               Achillea millefolium var. californica
                                                     [Achillea borealis subsp. californica]
                                                     [Achillea borealis var. californica]
                                                     [Achillea californica]
                                               Achillea millefolium var. gigantea
                                                     [Achillea gigantea]
                                               Achillea millefolium var. litoralis
                                               Achillea millefolium var. millefolium
                                                     [Achillea magna]
                                               Achillea millefolium var. nigrescens
                                                     [Achillea nigrescens]
                                               Achillea millefolium var. occidentalis
                                                     [Achillea angustissima]
                                                     [Achillea aspleniifolia]
                                                     [Achillea eradiata]
                                                     [Achillea gracilis]
                                                     [Achillea lanulosa subsp. typica]
                                                     [Achillea lanulosa var. arachnoidea]
                                                     [Achillea lanulosa var. eradiata]
                                                     [Achillea lanulosa]
                                                     [Achillea laxiflora]
                                                     [Achillea millefolium subsp. lanulosa]
                                                     [Achillea millefolium subsp. occidentalis]
                                                     [Achillea millefolium subsp. pallidotegula]
                                                     [Achillea millefolium var. aspleniifolia]
                                                     [Achillea millefolium var. gracilis]
                                                     [Achillea millefolium var. lanulosa]
                                                     [Achillea millefolium var. rosea]
                                                     [Achillea millefolium var. russeolata]
                                                     [Achillea occidentalis]
                                                     [Achillea rosea]
                                               Achillea millefolium var. pacifica
                                                     [Achillea pacifica]
                                               Achillea millefolium var. puberula
                                                     [Achillea puberula]
                                             Achillea nobilis
                                             Achillea obscura
                                                   [Achillea aspleniifolia]
                                             Achillea ptarmica
                                             Achillea sibirica
                                                   [Achillea multiflora]
                                             Achillea tomentosa
                                     Achyrachaena
                                             Achyrachaena mollis
                                     Acmella
                                             Acmella decumbens
                                                   [Spilanthes americana var. stolonifera]
                                                   [Spilanthes stolonifera]
                                             Acmella iodiscaea
                                                   [Spilanthes iodiscaea]
                                             Acmella oppositifolia
                                                   [Spilanthes americana]
                                             Acmella pilosa
                                             Acmella pusilla
                                                   [Spilanthes pusilla]
                                             Acmella repens
                                                   [Acmella oppositifolia var. repens]
                                                   [Spilanthes americana var. repens]
                                     Acnida
                                             Acnida tamariscina
                                     Acosta
                                             Acosta maculosa
                                     Acourtia
                                             Acourtia microcephala
                                                   [Perezia microcephala]
                                             Acourtia molinana
                                             Acourtia nana
                                                   [Perezia nana]
                                             Acourtia runcinata
                                                   [Perezia runcinata]
                                             Acourtia thurberi
                                                   [Perezia thurberi]
                                             Acourtia wrightii
                                                   [Perezia wrightii]
                                     Acroptilon
                                     Actinella
                                             Actinella punctata
                                     Adenocaulon
                                             Adenocaulon bicolor
                                     Adenolinum
                                     Adenophyllum
                                             Adenophyllum cooperi
                                                   [Dyssodia cooperi]
                                             Adenophyllum porophylloides
                                                   [Dyssodia porophylloides]
                                             Adenophyllum porophyllum
                                                   [Pteronia porophylla]
                                             Adenophyllum wrightii
                                                   [Dyssodia neomexicana]
                                                   [Hymenatherum neomexicanum]
                                     Adenoropium
                                     Adenostemma
                                             Adenostemma lavenia
                                                   [Verbesina lavenia]
                                             Adenostemma verbesina
                                                   [Cotula verbesina]
                                             Adenostemma viscosum
                                     Adenostyles
                                             Adenostyles alpina
                                               Adenostyles alpina subsp. alpina
                                                     [Cacalia reniformis]
                                     Ageratina
                                             Ageratina adenophora
                                                   [Eupatorium adenophorum]
                                                   [Eupatorium glandulosum]
                                             Ageratina altissima
                                                   [Ageratum altissimum]
                                                   [Eupatorium odoratum]
                                                   [Eupatorium rugosum var. chlorolepis]
                                                   [Eupatorium rugosum var. tomentellum]
                                                   [Eupatorium rugosum var. villicaule]
                                                   [Eupatorium rugosum]
                                                   [Eupatorium urticifolium var. tomentellum]
                                               Ageratina altissima var. altissima
                                                     [Ageratum altissimum]
                                                     [Eupatorium rugosum var. chlorolepis]
                                                     [Eupatorium rugosum var. tomentellum]
                                                     [Eupatorium rugosum var. villicaule]
                                                     [Eupatorium rugosum]
                                                     [Eupatorium urticifolium var. tomentellum]
                                               Ageratina altissima var. angustata
                                                     [Eupatorium rugosum var. angustata]
                                               Ageratina altissima var. roanensis
                                                     [Eupatorium roanense]
                                                     [Eupatorium rugosum var. roanense]
                                                     [Eupatorium urticifolium]
                                             Ageratina aromatica
                                                   [Eupatorium latidens]
                                               Ageratina aromatica var. aromatica
                                                     [Eupatorium aromaticum]
                                                     [Eupatorium latidens]
                                               Ageratina aromatica var. incisa
                                                     [Eupatorium aromaticum var. incisum]
                                             Ageratina havanensis
                                                   [Eupatorium havanense]
                                                   [Eupatorium texense]
                                             Ageratina herbacea
                                                   [Eupatorium herbaceum]
                                             Ageratina jucunda
                                                   [Eupatorium juncundum]
                                             Ageratina lemmonii
                                                   [Eupatorium lemmonii]
                                             Ageratina liebmannii
                                             Ageratina luciae-brauniae
                                                   [Eupatorium luciae-brauniae]
                                             Ageratina occidentalis
                                                   [Eupatorium occidentale]
                                             Ageratina paupercula
                                                   [Eupatorium pauperculum]
                                             Ageratina pichinchensis
                                             Ageratina resiniflua
                                                   [Eupatorium resinifluum]
                                             Ageratina riparia
                                                   [Eupatorium riparium]
                                             Ageratina rothrockii
                                                   [Eupatorium rothrockii]
                                             Ageratina shastensis
                                                   [Eupatorium shastense]
                                             Ageratina wrightii
                                                   [Eupatorium wrightii]
                                     Ageratum
                                             Ageratum conyzoides
                                             Ageratum corymbosum
                                             Ageratum guatemalense
                                             Ageratum houstonianum
                                             Ageratum maritimum
                                                   [Ageratum littorale]
                                     Agnorhiza
                                             Agnorhiza bolanderi
                                                   [Balsamorhiza bolanderi]
                                                   [Wyethia bolanderi]
                                             Agnorhiza elata
                                                   [Wyethia elata]
                                             Agnorhiza invenusta
                                                   [Wyethia invenusta]
                                             Agnorhiza ovata
                                                   [Wyethia ovata]
                                             Agnorhiza reticulata
                                                   [Wyethia reticulata]
                                     Agoseris
                                             Agoseris alpestris
                                             Agoseris apargioides
                                                   [Troximon apargioides]
                                               Agoseris apargioides var. apargioides
                                                     [Troximon apargioides]
                                               Agoseris apargioides var. eastwoodiae
                                                     [Agoseris eastwoodiae]
                                               Agoseris apargioides var. maritima
                                                     [Agoseris apargioides subsp. maritima]
                                                     [Agoseris maritima]
                                             Agoseris aurantiaca
                                                   [Agoseris lackschewitzii]
                                                   [Troximon aurantiacum]
                                               Agoseris aurantiaca var. aurantiaca
                                                     [Agoseris graminifolia]
                                                     [Agoseris rostrata]
                                                     [Troximon aurantiacum]
                                               Agoseris aurantiaca var. carnea
                                                     [Agoseris carnea]
                                               Agoseris aurantiaca var. purpurea
                                                     [Agoseris arizonica]
                                                     [Agoseris aurantiaca subsp. purpurea]
                                                     [Agoseris glauca var. cronquistii]
                                                     [Agoseris graminifolia]
                                                     [Agoseris rostrata]
                                             Agoseris coronopifolia
                                                   [Taraxacum pumilum]
                                             Agoseris dasycarpa
                                             Agoseris elata
                                                   [Agoseris laciniata]
                                                   [Stylopappus elatus]
                                             Agoseris glauca
                                                   [Troximon glaucum]
                                               Agoseris glauca var. agrestis
                                                     [Agoseris agrestis]
                                               Agoseris glauca var. dasycephala
                                                     [Agoseris glauca subsp. scorzonerifolia]
                                                     [Agoseris glauca var. asper]
                                                     [Agoseris glauca var. pumila]
                                                     [Agoseris scorzonerifolia]
                                                     [Agoseris turbinata]
                                                     [Troximon glaucum var. dasycephalum]
                                               Agoseris glauca var. glauca
                                                     [Agoseris turbinata]
                                                     [Troximon glaucum]
                                               Agoseris glauca var. laciniata
                                                     [Agoseris arizonica]
                                                     [Agoseris glauca var. parviflora]
                                                     [Macrorhynchus glaucus var. laciniatus]
                                                     [Troximon parviflorum]
                                             Agoseris grandiflora
                                                   [Agoseris laciniata]
                                                   [Agoseris plebeja]
                                                   [Troximon grandiflorum]
                                               Agoseris grandiflora var. leptophylla
                                             Agoseris heterophylla
                                                   [Agoseris heterophylla var. kymapleura]
                                                   [Macrorhynchus heterophyllus]
                                               Agoseris heterophylla var. cryptopleura
                                                     [Agoseris heterophylla subsp. californica]
                                                     [Agoseris heterophylla var. crenulata]
                                                     [Agoseris heterophylla var. turgida]
                                               Agoseris heterophylla var. heterophylla
                                                     [Agoseris heterophylla subsp. californica]
                                                     [Agoseris heterophylla subsp. normalis]
                                                     [Agoseris heterophylla var. kymapleura]
                                                     [Macrorhynchus heterophyllus]
                                               Agoseris heterophylla var. quentinii
                                             Agoseris hirsuta
                                             Agoseris montana
                                             Agoseris monticola
                                                   [Agoseris glauca var. monticola]
                                             Agoseris parviflora
                                                   [Agoseris glauca var. parviflora]
                                                   [Troximon parviflorum]
                                             Agoseris retrorsa
                                                   [Macrorhynchus retrorsus]
                                     Alcina
                                     Aldama
                                             Aldama cordifolia
                                                   [Viguiera cordifolia]
                                             Aldama dentata
                                             Aldama phenax
                                                   [Viguiera phenax]
                                     Almutaster
                                             Almutaster pauciflorus
                                                   [Aster hydrophilus]
                                                   [Aster pauciflorus]
                                     Amauria
                                     Amauriopsis
                                     Amberboa
                                             Amberboa moschata
                                                   [Centaurea moschata]
                                     Amblyolepis
                                             Amblyolepis setigera
                                                   [Helenium setigerum]
                                     Amblyopappus
                                             Amblyopappus pusillus
                                     Ambrosia
                                             Ambrosia acanthicarpa
                                                   [Franseria acanthicarpa]
                                                   [Gaertneria acanthicarpa]
                                             Ambrosia ambrosioides
                                                   [Franseria ambrosioides]
                                             Ambrosia artemisiifolia
                                               Ambrosia artemisiifolia var. artemisiifolia
                                               Ambrosia artemisiifolia var. elatior
                                                     [Ambrosia elatior]
                                               Ambrosia artemisiifolia var. paniculata
                                                     [Ambrosia glandulosa]
                                                     [Ambrosia monophylla]
                                                     [Ambrosia paniculata]
                                             Ambrosia bidentata
                                             Ambrosia canescens
                                             Ambrosia chamissonis
                                                   [Ambrosia chamissonis f. bipinnatisecta]
                                                   [Ambrosia chamissonis var. bipinnatisecta]
                                                   [Franseria chamissonis f. bipinnatisecta]
                                                   [Franseria chamissonis subsp. bipinnatisecta]
                                                   [Franseria chamissonis var. bipinnatisecta]
                                                   [Franseria chamissonis]
                                             Ambrosia cheiranthifolia
                                             Ambrosia chenopodiifolia
                                                   [Franseria chenopodiifolia]
                                             Ambrosia confertiflora
                                                   [Franseria confertiflora]
                                                   [Franseria strigulosa]
                                                   [Gaertneria tenuifolia]
                                             Ambrosia cordifolia
                                                   [Franseria cordifolia]
                                             Ambrosia cumanensis
                                             Ambrosia deltoidea
                                                   [Franseria deltoidea]
                                             Ambrosia dumosa
                                                   [Franseria dumosa]
                                             Ambrosia eriocentra
                                                   [Franseria eriocentra]
                                             Ambrosia grayi
                                                   [Franseria tomentosa]
                                                   [Gaertnera tomentosa]
                                                   [Gaertneria grayi]
                                             Ambrosia helenae
                                             Ambrosia hispida
                                             Ambrosia ilicifolia
                                                   [Franseria ilicifolia]
                                             Ambrosia intergradiens
                                             Ambrosia linearis
                                                   [Franseria linearis]
                                             Ambrosia monogyra
                                                   [Hymenoclea monogyra]
                                             Ambrosia peruviana
                                             Ambrosia psilostachya
                                                   [Ambrosia californica]
                                                   [Ambrosia coronopifolia]
                                                   [Ambrosia psilostachya var. californica]
                                                   [Ambrosia psilostachya var. lindheimeriana]
                                                   [Ambrosia rugelii]
                                               Ambrosia psilostachya var. coronopifolia
                                                     [Ambrosia coronopifolia]
                                             Ambrosia pumila
                                                   [Franseria pumila]
                                             Ambrosia salsola
                                                   [Hymenoclea salsola var. salsola]
                                                   [Hymenoclea salsola]
                                               Ambrosia salsola var. salsola
                                             Ambrosia sandersonii
                                                   [Hymenoclea sandersonii]
                                             Ambrosia tenuifolia
                                             Ambrosia tomentosa
                                                   [Franseria discolor]
                                                   [Franseria tomentosa]
                                                   [Gaertneria discolor]
                                                   [Gaertneria tomentosa]
                                             Ambrosia trifida
                                                   [Ambrosia trifida var. integrifolia]
                                               Ambrosia trifida var. texana
                                                     [Ambrosia aptera]
                                                     [Ambrosia trifida var. aptera]
                                               Ambrosia trifida var. trifida
                                                     [Ambrosia trifida var. integrifolia]
                                     Amellus
                                     Ampelaster
                                             Ampelaster carolinianus
                                                   [Aster carolinianus]
                                                   [Lasallea caroliniana]
                                                   [Virgulus carolinianus]
                                     Amphiachyris
                                             Amphiachyris amoena
                                                   [Xanthocephalum amoenum var. intermedium]
                                                   [Xanthocephalum amoenum]
                                             Amphiachyris amoenum
                                                   [Xanthocephalum amoenum]
                                             Amphiachyris dracunculoides
                                                   [Brachyris dracunculoides]
                                                   [Gutierrezia dracunculoides]
                                                   [Xanthocephalum amoenum var. intermedium]
                                                   [Xanthocephalum dracunculoides]
                                     Amphipappus
                                             Amphipappus fremontii
                                               Amphipappus fremontii subsp. fremontii
                                               Amphipappus fremontii var. fremontii
                                               Amphipappus fremontii var. spinosus
                                                     [Amphipappus fremontii subsp. spinosus]
                                     Amphistelma
                                     Anacyclus
                                             Anacyclus clavatus
                                                   [Anacyclus tomentosus]
                                                   [Anacylus clavatus]
                                                   [Anacylus tomentosus]
                                     Anacylus
                                     Anaphalis
                                             Anaphalis bicolor
                                                   [Gnaphalium bicolor]
                                             Anaphalis margaritacea
                                                   [Anaphalis margaritacea var. angustior]
                                                   [Anaphalis margaritacea var. intercedens]
                                                   [Anaphalis margaritacea var. occidentalis]
                                                   [Anaphalis margaritacea var. revoluta]
                                                   [Anaphalis margaritacea var. subalpina]
                                                   [Anaphalis occidentalis]
                                                   [Gnaphalium margaritaceum]
                                               Anaphalis margaritacea subsp. margaritacea
                                                     [Anaphalis margaritacea subsp. angustior]
                                                     [Anaphalis margaritacea var. angustior]
                                                     [Anaphalis margaritacea var. intercedens]
                                                     [Anaphalis margaritacea var. occidentalis]
                                                     [Anaphalis margaritacea var. revoluta]
                                                     [Anaphalis margaritacea var. subalpina]
                                                     [Anaphalis occidentalis]
                                                     [Gnaphalium margaritaceum]
                                     Anastrophus
                                     Anatherum
                                     Ancistrocarphus
                                             Ancistrocarphus filagineus
                                                   [Stylocline filaginea var. depressa]
                                                   [Stylocline filaginea]
                                     Anisocarpus
                                             Anisocarpus scabridus
                                                   [Raillardella scabrida]
                                                   [Raillardiopsis scabrida]
                                     Anisocoma
                                             Anisocoma acaulis
                                     Antennaria
                                             Antennaria alpina
                                                   [Antennaria alpina subsp. canescens]
                                                   [Antennaria alpina var. canescens]
                                                   [Antennaria alpina var. compacta]
                                                   [Antennaria alpina var. glabrata]
                                                   [Antennaria alpina var. intermedia]
                                                   [Antennaria alpina var. stolonifera]
                                                   [Antennaria alpina var. ungavensis]
                                                   [Antennaria arenicola]
                                                   [Antennaria atriceps]
                                                   [Antennaria bayardii]
                                                   [Antennaria boecheriana]
                                                   [Antennaria borealis]
                                                   [Antennaria brunnescens]
                                                   [Antennaria cana]
                                                   [Antennaria canescens subsp. porsildii]
                                                   [Antennaria canescens var. pseudoporsildii]
                                                   [Antennaria columnaris]
                                                   [Antennaria compacta]
                                                   [Antennaria confusa]
                                                   [Antennaria crymophila]
                                                   [Antennaria foggii]
                                                   [Antennaria friesiana subsp. compacta]
                                                   [Antennaria glabrata]
                                                   [Antennaria groenlandica]
                                                   [Antennaria hansii]
                                                   [Antennaria intermedia]
                                                   [Antennaria labradorica]
                                                   [Antennaria longii]
                                                   [Antennaria media subsp. compacta]
                                                   [Antennaria pallida]
                                                   [Antennaria pedunculata]
                                                   [Antennaria sornborgeri]
                                                   [Antennaria stolonifera]
                                                   [Antennaria subcanescens]
                                                   [Antennaria ungavensis]
                                                   [Antennaria vexillifera]
                                                   [Antennaria wiegandii]
                                                   [Gnaphalium alpinum]
                                             Antennaria anaphaloides
                                                   [Antennaria pulcherrima subsp. anaphaloides]
                                                   [Antennaria pulcherrima var. anaphaloides]
                                             Antennaria arcuata
                                             Antennaria argentea
                                                   [Antennaria luzuloides var. argentea]
                                             Antennaria aromatica
                                             Antennaria canescens
                                             Antennaria carpatica
                                             Antennaria corymbosa
                                                   [Antennaria acuta]
                                                   [Antennaria dioica var. corymbosa]
                                                   [Antennaria hygrophila]
                                                   [Antennaria nardina]
                                             Antennaria densifolia
                                                   [Antennaria ellyae]
                                             Antennaria dimorpha
                                                   [Antennaria dimorpha var. integra]
                                                   [Antennaria dimorpha var. latisquama]
                                                   [Antennaria dimorpha var. macrocephala]
                                                   [Antennaria latisquama]
                                                   [Antennaria macrocephala]
                                                   [Gnaphalium dimorphum]
                                             Antennaria dioica
                                                   [Antennaria dioica var. hyperborea]
                                                   [Antennaria hyperborea]
                                                   [Antennaria insularis]
                                                   [Gnaphalium dioicum]
                                             Antennaria flagellaris
                                                   [Antennaria dimorpha var. flagellaris]
                                             Antennaria foliacea
                                             Antennaria friesiana
                                               Antennaria friesiana subsp. alaskana
                                                     [Antennaria alaskana]
                                               Antennaria friesiana subsp. friesiana
                                                     [Antennaria alpina var. friesiana]
                                                     [Antennaria angustifolia]
                                                     [Antennaria ekmaniana]
                                               Antennaria friesiana subsp. neoalaskana
                                                     [Antennaria neoalaskana]
                                             Antennaria geyeri
                                                   [Gnaphalium alienum]
                                             Antennaria howellii
                                               Antennaria howellii subsp. canadensis
                                                     [Antennaria canadensis]
                                                     [Antennaria neglecta var. canadensis]
                                                     [Antennaria neglecta var. randii]
                                                     [Antennaria neodioica subsp. canadensis]
                                                     [Antennaria neodioica var. randii]
                                                     [Antennaria randii]
                                                     [Antennaria spathulata]
                                               Antennaria howellii subsp. howellii
                                                     [Antennaria callilepis]
                                                     [Antennaria eximia]
                                                     [Antennaria neglecta subsp. howellii]
                                                     [Antennaria neglecta var. howellii]
                                                     [Antennaria neodioica subsp. howellii]
                                               Antennaria howellii subsp. neodioica
                                                     [Antennaria grandis]
                                                     [Antennaria neglecta var. attenuata]
                                                     [Antennaria neglecta var. neodioica]
                                                     [Antennaria neodioica var. attenuata]
                                                     [Antennaria neodioica var. chlorophylla]
                                                     [Antennaria neodioica var. grandis]
                                                     [Antennaria neodioica var. interjecta]
                                                     [Antennaria neodioica var. rupicola]
                                                     [Antennaria neodioica]
                                                     [Antennaria obovata]
                                                     [Antennaria rhodantha]
                                                     [Antennaria rupicola]
                                                     [Antennaria russellii]
                                               Antennaria howellii subsp. petaloidea
                                                     [Antennaria appendiculata]
                                                     [Antennaria concolor]
                                                     [Antennaria neglecta var. petaloidea]
                                                     [Antennaria neodioica subsp. petaloidea]
                                                     [Antennaria neodioica var. petaloidea]
                                                     [Antennaria pedicellata]
                                                     [Antennaria petaloidea var. scariosa]
                                                     [Antennaria petaloidea var. subcorymbosa]
                                                     [Antennaria stenolepis]
                                             Antennaria lanata
                                                   [Antennaria carpatica var. lanata]
                                             Antennaria luzuloides
                                               Antennaria luzuloides subsp. aberrans
                                                     [Antennaria argentea subsp. aberrans]
                                                     [Antennaria luzuloides var. microcephala]
                                                     [Antennaria microcephala]
                                                     [Antennaria pyramidata]
                                               Antennaria luzuloides subsp. luzuloides
                                                     [Antennaria luzuloides var. oblanceolata]
                                                     [Antennaria oblanceolata]
                                             Antennaria macounii
                                             Antennaria marginata
                                                   [Antennaria dioica var. marginata]
                                                   [Antennaria fendleri]
                                                   [Antennaria peramoena]
                                             Antennaria media
                                                   [Antennaria alpina var. media]
                                                   [Antennaria austromontana]
                                                   [Antennaria candida]
                                                   [Antennaria densa]
                                                   [Antennaria gormanii]
                                                   [Antennaria modesta]
                                                   [Antennaria mucronata]
                                             Antennaria microphylla
                                                   [Antennaria bracteosa]
                                                   [Antennaria groenlandica]
                                                   [Antennaria nitida]
                                                   [Antennaria parvifolia var. bracteosa]
                                                   [Antennaria rosea var. nitida]
                                                   [Antennaria solstitialis]
                                             Antennaria monocephala
                                               Antennaria monocephala subsp. angustata
                                                     [Antennaria alpina var. megacephala]
                                                     [Antennaria angustata]
                                                     [Antennaria burwellensis]
                                                     [Antennaria congesta]
                                                     [Antennaria fernaldiana]
                                                     [Antennaria friesiana var. megacephala]
                                                     [Antennaria hudsonica]
                                                     [Antennaria megacephala]
                                                     [Antennaria pygmaea]
                                                     [Antennaria tansleyi]
                                                     [Antennaria tweedsmurii]
                                               Antennaria monocephala subsp. monocephala
                                                     [Antennaria exilis]
                                                     [Antennaria monocephala subsp. philonipha]
                                                     [Antennaria monocephala var. exilis]
                                                     [Antennaria nitens]
                                                     [Antennaria philonipha]
                                             Antennaria neglecta
                                                   [Antennaria angustiarum]
                                                   [Antennaria athabascensis]
                                                   [Antennaria campestris var. athabascensis]
                                                   [Antennaria campestris]
                                                   [Antennaria chelonica]
                                                   [Antennaria erosa]
                                                   [Antennaria howellii var. athabascensis]
                                                   [Antennaria howellii var. campestris]
                                                   [Antennaria longifolia]
                                                   [Antennaria lunellii]
                                                   [Antennaria nebraskensis]
                                                   [Antennaria neglecta var. athabascensis]
                                                   [Antennaria neglecta var. campestris]
                                                   [Antennaria parvula]
                                                   [Antennaria wilsonii]
                                             Antennaria oblancifolia
                                             Antennaria parlinii
                                               Antennaria parlinii subsp. fallax
                                                     [Antennaria ambigens]
                                                     [Antennaria ampla]
                                                     [Antennaria arkansana]
                                                     [Antennaria arnoglossa var. ambigens]
                                                     [Antennaria bifrons]
                                                     [Antennaria brainerdii]
                                                     [Antennaria calophylla]
                                                     [Antennaria fallax var. calophylla]
                                                     [Antennaria fallax]
                                                     [Antennaria farwellii]
                                                     [Antennaria greenei]
                                                     [Antennaria mesochora]
                                                     [Antennaria munda]
                                                     [Antennaria occidentalis]
                                                     [Antennaria parlinii var. farwellii]
                                                     [Antennaria plantaginifolia var. ambigens]
                                                     [Antennaria umbellata]
                                               Antennaria parlinii subsp. parlinii
                                                     [Antennaria arnoglossa]
                                                     [Antennaria parlinii var. arnoglossa]
                                                     [Antennaria plantaginifolia var. arnoglossa]
                                                     [Antennaria plantaginifolia var. parlinii]
                                             Antennaria parvifolia
                                                   [Antennaria aprica var. minuscula]
                                                   [Antennaria aprica]
                                                   [Antennaria aureola]
                                                   [Antennaria holmii]
                                                   [Antennaria latisquamea]
                                                   [Antennaria minuscula]
                                                   [Antennaria obtusata]
                                                   [Antennaria pumila]
                                                   [Antennaria recurva]
                                                   [Antennaria rhodantha]
                                                   [Antennaria rhodanthus]
                                             Antennaria petaloidea
                                             Antennaria plantaginifolia
                                                   [Antennaria caroliniana]
                                                   [Antennaria decipiens]
                                                   [Antennaria denikeana]
                                                   [Antennaria nemoralis]
                                                   [Antennaria petiolata]
                                                   [Antennaria pinetorum]
                                                   [Antennaria plantaginifolia var. petiolata]
                                                   [Gnaphalium plantaginifolium]
                                             Antennaria porsildii
                                                   [Antennaria canescens subsp. porsildii]
                                             Antennaria pulchella
                                                   [Antennaria alpina var. scabra]
                                                   [Antennaria media subsp. ciliata]
                                                   [Antennaria media subsp. pulchella]
                                                   [Antennaria scabra]
                                             Antennaria pulcherrima
                                               Antennaria pulcherrima subsp. pulcherrima
                                                     [Antennaria carpatica var. pulcherrima]
                                                     [Antennaria pulcherrima var. angustisquama]
                                                     [Antennaria pulcherrima var. sordida]
                                             Antennaria racemosa
                                                   [Antennaria petasites]
                                                   [Antennaria piperi]
                                             Antennaria rosea
                                               Antennaria rosea subsp. arida
                                                     [Antennaria arida subsp. viscidula]
                                                     [Antennaria arida]
                                                     [Antennaria scariosa]
                                               Antennaria rosea subsp. confinis
                                                     [Antennaria affinis]
                                                     [Antennaria albicans]
                                                     [Antennaria angustifolia]
                                                     [Antennaria arida var. humilis]
                                                     [Antennaria breitungii]
                                                     [Antennaria brevistyla]
                                                     [Antennaria concinna]
                                                     [Antennaria confinis]
                                                     [Antennaria dioica var. kernensis]
                                                     [Antennaria elegans]
                                                     [Antennaria foliacea var. humilis]
                                                     [Antennaria hansii]
                                                     [Antennaria incarnata]
                                                     [Antennaria laingii]
                                                     [Antennaria leontopodioides]
                                                     [Antennaria leuchippii]
                                                     [Antennaria rosea var. angustifolia]
                                                     [Antennaria sedoides]
                                                     [Antennaria sordida]
                                                     [Antennaria straminea]
                                                     [Antennaria subviscosa]
                                                     [Antennaria tomentella]
                                               Antennaria rosea subsp. pulvinata
                                                     [Antennaria affinis]
                                                     [Antennaria albescens]
                                                     [Antennaria fusca]
                                                     [Antennaria gaspensis]
                                                     [Antennaria howellii subsp. gaspensis]
                                                     [Antennaria isolepis]
                                                     [Antennaria maculata]
                                                     [Antennaria manicouagana]
                                                     [Antennaria media subsp. fusca]
                                                     [Antennaria neglecta var. gaspensis]
                                                     [Antennaria neodioica var. gaspensis]
                                                     [Antennaria peasei]
                                                     [Antennaria pulvinata subsp. albescens]
                                                     [Antennaria pulvinata]
                                                     [Antennaria sansonii]
                                                     [Antennaria straminea]
                                               Antennaria rosea subsp. rosea
                                                     [Antennaria acuminata]
                                                     [Antennaria alborosea]
                                                     [Antennaria chlorantha]
                                                     [Antennaria dioica var. rosea]
                                                     [Antennaria formosa]
                                                     [Antennaria hendersonii]
                                                     [Antennaria imbricata]
                                                     [Antennaria lanulosa]
                                                     [Antennaria neodioica var. chlorantha]
                                                     [Antennaria oxyphylla]
                                                     [Antennaria rosea subsp. divaricata]
                                                     [Antennaria rosea var. nitida]
                                                     [Antennaria speciosa]
                                               Antennaria rosea var. imbricata
                                             Antennaria rosulata
                                                   [Antennaria bakeri]
                                                   [Antennaria sierrae-blancae]
                                             Antennaria soliceps
                                             Antennaria solitaria
                                                   [Antennaria plantaginifolia var. monocephala]
                                             Antennaria stenophylla
                                                   [Antennaria alpina var. stenophylla]
                                                   [Antennaria leucophaea]
                                             Antennaria suffrutescens
                                             Antennaria umbrinella
                                                   [Antennaria aizoides]
                                                   [Antennaria flavescens]
                                                   [Antennaria reflexa]
                                             Antennaria virginica
                                                   [Antennaria neglecta var. argillicola]
                                                   [Antennaria virginica var. argillicola]
                                     Antenoron
                                     Anthacanthus
                                     Anthemis
                                             Anthemis arvensis
                                                   [Anthemis arvensis var. agrestis]
                                               Anthemis arvensis subsp. arvensis
                                                     [Anthemis arvensis var. agrestis]
                                             Anthemis cotula
                                                   [Maruta cotula]
                                             Anthemis secundiramea
                                             Anthemis tomentosa
                                               Anthemis tomentosa subsp. tomentosa
                                                     [Anthemis altissima]
                                     Antheropeas
                                     Anthocephalus
                                     Anthochloa
                                     Anthopogon
                                     Aphanostephus
                                             Aphanostephus pilosus
                                             Aphanostephus ramosissimus
                                               Aphanostephus ramosissimus var. humilis
                                                     [Aphanostephus arizonicus]
                                                     [Aphanostephus humilis]
                                                     [Aphanostephus potosinus]
                                                     [Leucopsidium humile]
                                               Aphanostephus ramosissimus var. ramosissimus
                                             Aphanostephus riddellii
                                             Aphanostephus skirrhobasis
                                               Aphanostephus skirrhobasis var. kidderi
                                                     [Aphanostephus kidderi]
                                               Aphanostephus skirrhobasis var. skirrhobasis
                                                     [Keerlia skirrhobasis]
                                               Aphanostephus skirrhobasis var. thalassius
                                             Aphanostephus skirrobasis
                                                   [Keerlia skirrhobasis]
                                               Aphanostephus skirrobasis var. kidderi
                                                     [Aphanostephus kidderi]
                                     Aphantochaeta
                                     Aplopappus
                                     Arctanthemum
                                             Arctanthemum arcticum
                                               Arctanthemum arcticum subsp. arcticum
                                                     [Chrysanthemum arcticum subsp. arcticum]
                                                     [Chrysanthemum arcticum]
                                                     [Dendranthema arcticum subsp. arcticum]
                                                     [Dendranthema arcticum]
                                                     [Leucanthemum arcticum]
                                               Arctanthemum arcticum subsp. polare
                                                     [Chrysanthemum arcticum subsp. polare]
                                                     [Chrysanthemum arcticum var. polare]
                                                     [Dendranthema arcticum subsp. polare]
                                                     [Dendranthema hultenii]
                                             Arctanthemum integrifolium
                                                   [Chrysanthemum integrifolium]
                                                   [Hulteniella integrifolia]
                                                   [Leucanthemum integrifolium]
                                     Arctium
                                             Arctium lappa
                                                   [Lappa major]
                                             Arctium minus
                                                   [Lappa minor]
                                             Arctium nemorosum
                                                   [Arctium minus subsp. nemorosum]
                                             Arctium tomentosum
                                             Arctium vulgare
                                                   [Arctium minus subsp. nemorosum]
                                     Arctotheca
                                             Arctotheca calendula
                                     Arctotis
                                             Arctotis fastuosa
                                                   [Venidium fastuosum]
                                             Arctotis stoechadifolia
                                                   [Arctotis grandis]
                                                   [Arctotis stoechadifolia var. grandis]
                                     Arctous
                                     Arcyphyllum
                                     Argyranthemum
                                             Argyranthemum foeniculum
                                                   [Argyranthemum anethifolium]
                                                   [Pyrethrum anethifolium]
                                             Argyranthemum frutescens
                                                   [Chrysanthemum frutescens]
                                               Argyranthemum frutescens subsp. frutescens
                                                     [Chrysanthemum frutescens]
                                             Argyranthemum tenerifae
                                                   [Argyranthemum anethifolium]
                                                   [Pyrethrum anethifolium]
                                     Argyrautia
                                             Argyrautia degeneri
                                     Argyroxiphium
                                             Argyroxiphium caliginis
                                             Argyroxiphium grayanum
                                                   [Wilkesia grayana]
                                             Argyroxiphium kai
                                                   [Argyroxiphium caliginis var. kai]
                                             Argyroxiphium kauense
                                                   [Argyroxiphium sandwicense var. kauense]
                                             Argyroxiphium sandwicense
                                               Argyroxiphium sandwicense subsp. macrocephalum
                                                     [Argyroxiphium macrocephalum]
                                               Argyroxiphium sandwicense subsp. sandwicense
                                             Argyroxiphium virescens
                                                   [Argyroxiphium forbesii]
                                     Arnica
                                             Arnica acaulis
                                                   [Doronicum acaule]
                                             Arnica alpina
                                             Arnica angustifolia
                                               Arnica angustifolia subsp. angustifolia
                                                     [Arnica alpina subsp. angustifolia]
                                                     [Arnica alpina subsp. attenuata]
                                                     [Arnica alpina subsp. sornborgeri]
                                                     [Arnica alpina var. angustifolia]
                                                     [Arnica alpina var. attenuata]
                                                     [Arnica alpina var. linearis]
                                                     [Arnica alpina var. plantaginea]
                                                     [Arnica alpina var. ungavensis]
                                                     [Arnica alpina var. vestita]
                                                     [Arnica angustifolia subsp. attenuata]
                                                     [Arnica plantaginea]
                                                     [Arnica sornborgeri]
                                                     [Arnica terrae-novae]
                                               Arnica angustifolia subsp. tomentosa
                                                     [Arnica alpina subsp. tomentosa]
                                                     [Arnica alpina var. tomentosa]
                                                     [Arnica angustifolia var. tomentosa]
                                                     [Arnica tomentosa]
                                             Arnica cernua
                                                   [Arnica chandleri]
                                             Arnica chamissonis
                                                   [Arnica bernardina]
                                                   [Arnica chamissonis subsp. foliosa]
                                                   [Arnica chamissonis subsp. incana]
                                                   [Arnica chamissonis var. andina]
                                                   [Arnica chamissonis var. bernardina]
                                                   [Arnica chamissonis var. jepsoniana]
                                                   [Arnica chamissonis var. maguirei]
                                                   [Arnica foliosa]
                                               Arnica chamissonis subsp. chamissonis
                                               Arnica chamissonis var. chamissonis
                                                     [Arnica chamissonis subsp. genuina]
                                               Arnica chamissonis var. incana
                                                     [Arnica chamissonis subsp. incana]
                                                     [Arnica foliosa var. incana]
                                               Arnica chamissonis var. interior
                                             Arnica cordifolia
                                                   [Arnica cordifolia subsp. genuina]
                                                   [Arnica cordifolia subsp. whitneyi]
                                                   [Arnica cordifolia var. humilis]
                                                   [Arnica cordifolia var. pumila]
                                                   [Arnica cordifolia var. whitneyi]
                                                   [Arnica hardinae]
                                                   [Arnica humilis]
                                                   [Arnica whitneyi]
                                             Arnica dealbata
                                                   [Whitneya dealbata]
                                             Arnica discoidea
                                                   [Arnica discoidea var. alata]
                                                   [Arnica discoidea var. eradiata]
                                                   [Arnica grayi]
                                                   [Arnica parviflora subsp. alata]
                                                   [Arnica parviflora]
                                             Arnica diversifolia
                                             Arnica fulgens
                                             Arnica gracilis
                                                   [Arnica latifolia var. gracilis]
                                             Arnica griscomii
                                               Arnica griscomii subsp. frigida
                                                     [Arnica frigida subsp. frigida]
                                                     [Arnica frigida]
                                                     [Arnica louiseana subsp. frigida]
                                                     [Arnica louiseana var. frigida]
                                                     [Arnica louiseana var. mendenhallii]
                                                     [Arnica louiseana var. pilosa]
                                               Arnica griscomii subsp. griscomii
                                                     [Arnica frigida subsp. griscomii]
                                                     [Arnica louiseana subsp. griscomii]
                                             Arnica lanceolata
                                                   [Arnica mollis var. petiolaris]
                                               Arnica lanceolata subsp. lanceolata
                                                     [Arnica mollis var. petiolaris]
                                               Arnica lanceolata subsp. prima
                                                     [Arnica amplexicaulis subsp. prima]
                                                     [Arnica amplexicaulis var. piperi]
                                                     [Arnica amplexicaulis var. prima]
                                                     [Arnica amplexicaulis]
                                                     [Arnica mollis var. aspera]
                                             Arnica latifolia
                                                   [Arnica latifolia var. angustifolia]
                                             Arnica lessingii
                                                   [Arnica lessingii subsp. norbergii]
                                             Arnica lonchophylla
                                                   [Arnica alpina subsp. lonchophylla]
                                                   [Arnica alpina var. lonchophylla]
                                                   [Arnica angustifolia subsp. lonchophylla]
                                                   [Arnica arnoglossa]
                                                   [Arnica chionopappa]
                                                   [Arnica gaspensis]
                                                   [Arnica lonchophylla subsp. arnoglossa]
                                                   [Arnica lonchophylla subsp. chionopappa]
                                                   [Arnica lonchophylla var. arnoglossa]
                                               Arnica lonchophylla subsp. lonchophylla
                                                     [Arnica alpina subsp. lonchophylla]
                                                     [Arnica alpina var. lonchophylla]
                                                     [Arnica angustifolia subsp. lonchophylla]
                                                     [Arnica chionopappa]
                                                     [Arnica gaspensis]
                                                     [Arnica lonchophylla subsp. chionopappa]
                                             Arnica longifolia
                                                   [Arnica longifolia subsp. genuina]
                                                   [Arnica longifolia subsp. myriadenia]
                                             Arnica louiseana
                                             Arnica mollis
                                                   [Arnica mollis var. silvatica]
                                             Arnica montana
                                               Arnica montana subsp. montana
                                             Arnica nevadensis
                                                   [Arnica tomentella]
                                             Arnica ovata
                                             Arnica paniculata
                                             Arnica parryi
                                                   [Arnica parryi subsp. sonnei]
                                                   [Arnica parryi var. sonnei]
                                                   [Arnica sonnei]
                                               Arnica parryi subsp. parryi
                                                     [Arnica parryi subsp. genuina]
                                             Arnica rydbergii
                                                   [Arnica cascadensis]
                                             Arnica sororia
                                                   [Arnica fulgens var. sororia]
                                             Arnica spathulata
                                                   [Arnica cusickii]
                                                   [Arnica spathulata subsp. eastwoodiae]
                                                   [Arnica spathulata var. eastwoodiae]
                                             Arnica unalaschcensis
                                             Arnica venosa
                                             Arnica viscosa
                                                   [Chrysopsis shastensis]
                                     Arnoglossum
                                             Arnoglossum album
                                             Arnoglossum atriplicifolium
                                                   [Cacalia atriplicifolia]
                                                   [Cacalia paniculata]
                                                   [Cacalia rotundifolia]
                                                   [Mesadenia atriplicifolia]
                                             Arnoglossum diversifolium
                                                   [Cacalia diversifolia]
                                                   [Mesadenia diversifolia]
                                             Arnoglossum floridanum
                                                   [Cacalia floridana]
                                                   [Mesadenia floridana]
                                             Arnoglossum muehlenbergii
                                                   [Senecio muehlenbergii]
                                             Arnoglossum ovatum
                                                   [Cacalia elliottii]
                                                   [Cacalia lanceolata var. elliottii]
                                                   [Cacalia lanceolata var. virescens]
                                                   [Cacalia lanceolata]
                                                   [Cacalia ovata]
                                                   [Mesadenia elliottii]
                                                   [Mesadenia lanceolata var. virescens]
                                                   [Mesadenia lanceolata]
                                                   [Mesadenia maxima]
                                             Arnoglossum plantagineum
                                                   [Cacalia paniculata]
                                                   [Cacalia plantaginea]
                                                   [Cacalia pteranthes]
                                                   [Cacalia tuberosa]
                                                   [Mesadenia tuberosa]
                                             Arnoglossum reniforme
                                                   [Cacalia muehlenbergii]
                                                   [Cacalia reniformis]
                                                   [Mesadenia reniformis]
                                                   [Senecio muehlenbergii]
                                             Arnoglossum sulcatum
                                                   [Cacalia sulcata]
                                                   [Mesadenia sulcata]
                                     Arnoseris
                                             Arnoseris minima
                                                   [Hyoseris minima]
                                     Artemisia
                                             Artemisia abrotanum
                                                   [Artemisia procera]
                                             Artemisia absinthium
                                                   [Artemisia absinthium var. insipida]
                                             Artemisia albicans
                                                   [Sphaeromeria cana]
                                                   [Tanacetum canum]
                                             Artemisia aleutica
                                             Artemisia annua
                                             Artemisia arbuscula
                                               Artemisia arbuscula subsp. arbuscula
                                                     [Artemisia tridentata subsp. arbuscula]
                                                     [Seriphidium arbusculum]
                                               Artemisia arbuscula subsp. longicaulis
                                               Artemisia arbuscula subsp. longiloba
                                                     [Artemisia arbuscula var. longiloba]
                                                     [Artemisia longiloba]
                                                     [Artemisia spiciformis var. longiloba]
                                                     [Seriphidium arbusculum subsp. longilobum]
                                               Artemisia arbuscula subsp. thermopola
                                             Artemisia australis
                                                   [Artemisia hillebrandii]
                                             Artemisia biennis
                                                   [Artemisia biennis var. diffusa]
                                               Artemisia biennis var. biennis
                                             Artemisia bigelovii
                                             Artemisia californica
                                             Artemisia campestris
                                               Artemisia campestris subsp. borealis
                                                     [Artemisia borealis f. latisecta]
                                                     [Artemisia borealis f. purshii]
                                                     [Artemisia borealis subsp. purshii]
                                                     [Artemisia borealis var. latisecta]
                                                     [Artemisia borealis var. purshii]
                                                     [Artemisia borealis]
                                                     [Artemisia campestris var. purshii]
                                                     [Artemisia purshiana]
                                                     [Artemisia ripicola]
                                                     [Oligosporus groenlandicus]
                                               Artemisia campestris subsp. campestris
                                                     [Oligosporus campestris]
                                               Artemisia campestris subsp. canadensis
                                                     [Artemisia campestris var. canadensis]
                                                     [Artemisia canadensis]
                                               Artemisia campestris subsp. caudata
                                                     [Artemisia campestris var. caudata]
                                                     [Artemisia caudata var. calvens]
                                                     [Artemisia caudata]
                                                     [Artemisia forwoodii]
                                                     [Oligosporus campestris subsp. caudatus]
                                                     [Oligosporus caudatus]
                                               Artemisia campestris subsp. pacifica
                                                     [Artemisia campestris var. pacifica]
                                                     [Artemisia campestris var. petiolata]
                                                     [Artemisia campestris var. scouleriana]
                                                     [Artemisia camporum]
                                                     [Artemisia pacifica]
                                                     [Oligosporus campestris subsp. pacificus]
                                                     [Oligosporus pacificus]
                                               Artemisia campestris subsp. richardsoniana
                                                     [Artemisia arctica subsp. arctica]
                                                     [Artemisia arctica]
                                                     [Artemisia richardsoniana]
                                               Artemisia campestris var. borealis
                                                     [Artemisia borealis subsp. purshii]
                                                     [Artemisia borealis var. latisecta]
                                                     [Artemisia borealis var. purshii]
                                                     [Artemisia borealis]
                                                     [Artemisia campestris var. canadensis]
                                                     [Artemisia campestris var. purshii]
                                                     [Artemisia canadensis]
                                                     [Artemisia richardsoniana]
                                                     [Artemisia spithamea]
                                                     [Oligosporus groenlandicus]
                                               Artemisia campestris var. wormskioldii
                                             Artemisia cana
                                                   [Artemisia cana/ludoviciana]
                                               Artemisia cana subsp. bolanderi
                                                     [Artemisia bolanderi]
                                                     [Artemisia tridentata subsp. bolanderi]
                                                     [Artemisia tridentata var. bolanderi]
                                                     [Seriphidium canum subsp. bolanderi]
                                               Artemisia cana subsp. cana
                                                     [Seriphidium canum]
                                               Artemisia cana subsp. viscidula
                                                     [Artemisia argilosa]
                                                     [Artemisia cana var. viscidula]
                                                     [Seriphidium canum subsp. viscidulum]
                                               Artemisia cana var. cana
                                             Artemisia capitata
                                                   [Tanacetum capitatum]
                                             Artemisia carruthii
                                                   [Artemisia carruthii var. wrightii]
                                                   [Artemisia kansana]
                                             Artemisia constricta
                                                   [Sphaeromeria compacta]
                                                   [Tanacetum compactum]
                                             Artemisia douglasiana
                                                   [Artemisia campestris var. douglasiana]
                                                   [Artemisia vulgaris subsp. heterophylla]
                                                   [Artemisia vulgaris var. douglasiana]
                                             Artemisia dracunculus
                                                   [Artemisia dracunculoides var. dracunculina]
                                                   [Artemisia dracunculoides]
                                                   [Artemisia dracunculus subsp. glauca]
                                                   [Artemisia dracunculus var. glauca]
                                                   [Artemisia glauca var. dracunculina]
                                                   [Oligosporus dracunculus subsp. dracunculinus]
                                                   [Oligosporus dracunculus subsp. glaucus]
                                                   [Oligosporus dracunculus]
                                             Artemisia filifolia
                                             Artemisia franserioides
                                             Artemisia frigida
                                             Artemisia furcata
                                               Artemisia furcata subsp. furcata
                                                     [Artemisia furcata var. heterophylla]
                                                     [Artemisia hyperborea]
                                                     [Artemisia tacomensis]
                                                     [Artemisia trifurcata]
                                               Artemisia furcata var. furcata
                                                     [Artemisia hyperborea]
                                                     [Artemisia tacomensis]
                                                     [Artemisia trifurcata]
                                             Artemisia glauca
                                                   [Artemisia dracunculus subsp. glauca]
                                                   [Oligosporus dracunculus subsp. glaucus]
                                             Artemisia globularia
                                                   [Artemisia flava]
                                                   [Artemisia globularia var. lutea]
                                               Artemisia globularia subsp. lutea
                                                     [Artemisia flava]
                                                     [Artemisia globularia var. lutea]
                                             Artemisia glomerata
                                               Artemisia glomerata var. glomerata
                                               Artemisia glomerata var. subglabrata
                                             Artemisia gmelinii
                                                   [Artemisia sacrorum]
                                             Artemisia inaequifolia
                                                   [Sphaeromeria diversifolia]
                                                   [Tanacetum diversifolium]
                                             Artemisia kauaiensis
                                                   [Artemisia hillebrandii var. kauaiensis]
                                             Artemisia kruhsiana
                                               Artemisia kruhsiana subsp. alaskana
                                                     [Artemisia alaskana]
                                             Artemisia laciniata
                                                   [Artemisia laciniatiformis]
                                               Artemisia laciniata subsp. laciniata
                                                     [Artemisia laciniatiformis]
                                                     [Artemisia macrobotrys]
                                               Artemisia laciniata subsp. parryi
                                                     [Artemisia parryi]
                                             Artemisia longifolia
                                             Artemisia ludoviciana
                                                   [Artemisia cana/ludoviciana]
                                               Artemisia ludoviciana subsp. albula
                                                     [Artemisia albula]
                                                     [Artemisia ludoviciana var. albula]
                                               Artemisia ludoviciana subsp. candicans
                                                     [Artemisia candicans]
                                                     [Artemisia ludoviciana var. latiloba]
                                               Artemisia ludoviciana subsp. estesii
                                               Artemisia ludoviciana subsp. incompta
                                                     [Artemisia incompta]
                                                     [Artemisia ludoviciana var. incompta]
                                                     [Artemisia prescottiana]
                                               Artemisia ludoviciana subsp. lindleyana
                                                     [Artemisia lindleyana]
                                               Artemisia ludoviciana subsp. ludoviciana
                                                     [Artemisia diversifolia]
                                                     [Artemisia gnaphalodes]
                                                     [Artemisia herriotii]
                                                     [Artemisia ludoviciana subsp. typica]
                                                     [Artemisia ludoviciana var. americana]
                                                     [Artemisia ludoviciana var. brittonii]
                                                     [Artemisia ludoviciana var. gnaphalodes]
                                                     [Artemisia ludoviciana var. latifolia]
                                                     [Artemisia ludoviciana var. pabularis]
                                                     [Artemisia pabularis]
                                                     [Artemisia purshiana]
                                                     [Artemisia vulgaris subsp. ludoviciana]
                                                     [Artemisia vulgaris var. ludoviciana]
                                               Artemisia ludoviciana subsp. mexicana
                                                     [Artemisia mexicana]
                                                     [Artemisia neomexicana]
                                                     [Artemisia vulgaris var. mexicana]
                                               Artemisia ludoviciana subsp. redolens
                                                     [Artemisia ludoviciana var. redolens]
                                                     [Artemisia redolens]
                                               Artemisia ludoviciana subsp. sulcata
                                                     [Artemisia sulcata]
                                               Artemisia ludoviciana var. mexicana
                                             Artemisia mauiensis
                                                   [Artemisia mauiensis var. diffusa]
                                             Artemisia michauxiana
                                                   [Artemisia vulgaris subsp. michauxiana]
                                             Artemisia nesiotica
                                                   [Artemisia californica var. insularis]
                                             Artemisia norvegica
                                               Artemisia norvegica subsp. saxatilis
                                                     [Artemisia arctica subsp. beringensis]
                                                     [Artemisia arctica subsp. comata]
                                                     [Artemisia arctica subsp. saxicola]
                                                     [Artemisia comata]
                                                     [Artemisia norvegica var. comata]
                                                     [Artemisia norvegica var. piceetorum]
                                                     [Artemisia norvegica var. saxatilis]
                                             Artemisia nova
                                                   [Artemisia arbuscula subsp. nova]
                                                   [Artemisia arbuscula var. nova]
                                                   [Artemisia nova var. duchesnicola]
                                                   [Artemisia tridentata subsp. nova]
                                                   [Seriphidium novum]
                                             Artemisia nuttallii
                                                   [Sphaeromeria argentea]
                                                   [Tanacetum nuttallii]
                                             Artemisia opulenta
                                                   [Artemisia vulgaris var. kamtschatica]
                                             Artemisia packardiae
                                             Artemisia palmeri
                                             Artemisia papposa
                                             Artemisia pedatifida
                                             Artemisia pontica
                                             Artemisia porteri
                                             Artemisia potentilloides
                                                   [Sphaeromeria potentilloides var. potentilloides]
                                                   [Sphaeromeria potentilloides]
                                                   [Tanacetum potentilloides]
                                                   [Vesicarpa potentilloides var. potentilloides]
                                                   [Vesicarpa potentilloides]
                                               Artemisia potentilloides var. nitrophila
                                                     [Sphaeromeria potentilloides var. nitrophila]
                                                     [Tanacetum potentilloides var. nitrophilum]
                                             Artemisia pycnocephala
                                             Artemisia pygmaea
                                                   [Seriphidium pygmaeum]
                                             Artemisia rigida
                                                   [Artemisia trifida var. rigida]
                                                   [Seriphidium rigidum]
                                             Artemisia rothrockii
                                                   [Artemisia tridentata subsp. rothrockii]
                                                   [Artemisia tridentata var. rothrockii]
                                                   [Seriphidium rothrockii]
                                             Artemisia ruthiae
                                                   [Sphaeromeria ruthiae]
                                             Artemisia scoparia
                                             Artemisia scopulorum
                                             Artemisia selengensis
                                                   [Artemisia vulgaris var. selengensis]
                                             Artemisia senjavinensis
                                             Artemisia serrata
                                             Artemisia simplex
                                                   [Sphaeromeria simplex]
                                                   [Tanacetum simplex]
                                             Artemisia spiciformis
                                             Artemisia spinescens
                                                   [Picrothamnus desertorum]
                                             Artemisia stelleriana
                                             Artemisia suksdorfii
                                             Artemisia tilesii
                                                   [Artemisia elatior]
                                                   [Artemisia hookeriana]
                                                   [Artemisia tilesii subsp. elatior]
                                                   [Artemisia tilesii subsp. gormanii]
                                                   [Artemisia tilesii subsp. unalaschcensis]
                                                   [Artemisia tilesii var. aleutica]
                                                   [Artemisia tilesii var. elatior]
                                                   [Artemisia tilesii var. unalaschcensis]
                                                   [Artemisia unalaskensis var. aleutica]
                                                   [Artemisia unalaskensis]
                                               Artemisia tilesii subsp. tilesii
                                             Artemisia tridentata
                                               Artemisia tridentata subsp. parishii
                                                     [Artemisia tridentata var. parishii]
                                                     [Seriphidium tridentatum subsp. parishii]
                                               Artemisia tridentata subsp. spiciformis
                                                     [Artemisia tridentata var. spiciformis]
                                               Artemisia tridentata subsp. tridentata
                                                     [Artemisia angusta]
                                                     [Artemisia tridentata subsp. xericensis]
                                                     [Artemisia tridentata var. angustifolia]
                                                     [Seriphidium tridentatum]
                                               Artemisia tridentata subsp. vaseyana
                                                     [Artemisia tridentata var. pauciflora]
                                                     [Artemisia vaseyana]
                                                     [Seriphidium tridentatum subsp. vaseyanum]
                                                     [Seriphidium vaseyanum]
                                               Artemisia tridentata subsp. wyomingensis
                                                     [Artemisia tridentata var. wyomingensis]
                                                     [Seriphidium tridentatum subsp. wyomingense]
                                               Artemisia tridentata var. vaseyana
                                             Artemisia trifida
                                             Artemisia tripartita
                                               Artemisia tripartita subsp. rupicola
                                                     [Artemisia tripartita var. rupicola]
                                               Artemisia tripartita subsp. tripartita
                                                     [Artemisia tridentata subsp. trifida]
                                                     [Seriphidium tripartitum]
                                             Artemisia umbelliformis
                                                   [Artemisia laxa]
                                               Artemisia umbelliformis subsp. umbelliformis
                                                     [Artemisia laxa]
                                             Artemisia vulgaris
                                                   [Artemisia tilesii var. aleutica]
                                                   [Artemisia unalaskensis var. aleutica]
                                                   [Artemisia unalaskensis]
                                                   [Artemisia vulgaris var. coarctata]
                                                   [Artemisia vulgaris var. glabra]
                                                   [Artemisia vulgaris var. kamtschatica]
                                                   [Artemisia vulgaris var. latiloba]
                                                   [Artemisia vulgaris var. selengensis]
                                               Artemisia vulgaris subsp. vulgaris
                                                     [Artemisia heterophylla]
                                                     [Artemisia vulgaris subsp. coarctata]
                                                     [Artemisia vulgaris var. glabra]
                                                     [Artemisia vulgaris var. latiloba]
                                               Artemisia vulgaris var. vulgaris
                                     Asanthus
                                             Asanthus squamulosus
                                                   [Brickellia squamulosa]
                                     Askellia
                                             Askellia elegans
                                                   [Crepis elegans]
                                             Askellia pygmaea
                                                   [Askellia nana subsp. ramosa]
                                                   [Askellia nana]
                                                   [Askellia pygmaea subsp. ramosa]
                                                   [Crepis nana subsp. clivicola]
                                                   [Crepis nana subsp. nana]
                                                   [Crepis nana subsp. ramosa]
                                                   [Crepis nana var. lyratifolia]
                                                   [Crepis nana var. ramosa]
                                                   [Crepis nana]
                                     Aster
                                             Aster alpinus
                                               Aster alpinus var. serpentimontanus
                                               Aster alpinus var. vierhapperi
                                                     [Aster alpinus subsp. vierhapperi]
                                                     [Diplactis alpina subsp. vierhapperi]
                                             Aster andersonii
                                             Aster ascendens
                                             Aster asteroides
                                             Aster diffusus
                                             Aster indicus
                                                   [Kalimeris indica]
                                             Aster lucidulus
                                             Aster neoelegans
                                                   [Aster elegans]
                                             Aster ovatus
                                             Aster pinnatifidus
                                             Aster tataricus
                                                   [Aster conspicuus]
                                             Aster unalaschkensis
                                     Asterandra
                                     Astranthium
                                             Astranthium ciliatum
                                                   [Astranthium integrifolium subsp. ciliatum]
                                                   [Astranthium integrifolium var. ciliatum]
                                             Astranthium integrifolium
                                               Astranthium integrifolium subsp. integrifolium
                                                     [Bellis integrifolia]
                                             Astranthium robustum
                                                   [Astranthium integrifolium var. robustum]
                                     Atrichoseris
                                             Atrichoseris platyphylla
                                                   [Malacothrix platyphylla]
                                     Ayapana
                                             Ayapana triplinervis
                                     Baccharis
                                             Baccharis angustifolia
                                             Baccharis bigelovii
                                             Baccharis brachyphylla
                                             Baccharis dioica
                                             Baccharis douglasii
                                                   [Baccharis glutinosa]
                                             Baccharis glomeruliflora
                                             Baccharis halimifolia
                                                   [Baccharis halimifolia var. angustior]
                                             Baccharis havardii
                                             Baccharis malibuensis
                                             Baccharis myrsinites
                                             Baccharis neglecta
                                             Baccharis pilularis
                                                   [Baccharis pilularis var. consanguinea]
                                               Baccharis pilularis subsp. consanguinea
                                                     [Baccharis pilularis var. consanguinea]
                                             Baccharis plummerae
                                               Baccharis plummerae subsp. glabrata
                                               Baccharis plummerae subsp. plummerae
                                             Baccharis pteronioides
                                             Baccharis salicifolia
                                                   [Baccharis glutinosa]
                                                   [Baccharis viminea]
                                                   [Molina salicifolia]
                                               Baccharis salicifolia subsp. salicifolia
                                                     [Baccharis viminea]
                                                     [Molina salicifolia]
                                             Baccharis salicina
                                                   [Baccharis emoryi]
                                             Baccharis sarothroides
                                             Baccharis sergiloides
                                             Baccharis texana
                                                   [Linosyris texana]
                                             Baccharis thesioides
                                             Baccharis vanessae
                                             Baccharis wrightii
                                     Bahia
                                     Bahiopsis
                                             Bahiopsis deltoidea
                                                   [Viguiera deltoidea]
                                             Bahiopsis laciniata
                                                   [Viguiera laciniata]
                                             Bahiopsis parishii
                                                   [Viguiera deltoidea var. parishii]
                                                   [Viguiera parishii]
                                             Bahiopsis reticulata
                                                   [Viguiera reticulata]
                                     Baileya
                                             Baileya multiradiata
                                                   [Baileya multiradiata var. thurberi]
                                             Baileya pauciradiata
                                             Baileya pleniradiata
                                                   [Baileya multiradiata var. pleniradiata]
                                                   [Baileya perennis]
                                     Balduina
                                             Balduina angustifolia
                                                   [Actinospermum angustifolium]
                                             Balduina atropurpurea
                                                   [Endorima atropurpurea]
                                             Balduina uniflora
                                                   [Endorima uniflora]
                                     Balsamorhiza
                                             Balsamorhiza bonseri
                                             Balsamorhiza careyana
                                               Balsamorhiza careyana var. careyana
                                               Balsamorhiza careyana var. intermedia
                                             Balsamorhiza deltoidea
                                             Balsamorhiza hispidula
                                                   [Balsamorhiza hookeri var. hispidula]
                                             Balsamorhiza hookeri
                                               Balsamorhiza hookeri var. hirsuta
                                                     [Balsamorhiza hirsuta]
                                               Balsamorhiza hookeri var. hookeri
                                               Balsamorhiza hookeri var. idahoensis
                                                     [Balsamorhiza macrophylla var. idahoensis]
                                               Balsamorhiza hookeri var. lagocephala
                                                     [Balsamorhiza hirsuta var. lagocephala]
                                               Balsamorhiza hookeri var. neglecta
                                                     [Balsamorhiza hirsuta var. neglecta]
                                             Balsamorhiza incana
                                             Balsamorhiza lanata
                                                   [Balsamorhiza hookeri var. lanata]
                                             Balsamorhiza macrolepis
                                               Balsamorhiza macrolepis var. macrolepis
                                               Balsamorhiza macrolepis var. platylepis
                                                     [Balsamorhiza hookeri var. platylepis]
                                                     [Balsamorhiza platylepis]
                                             Balsamorhiza macrophylla
                                             Balsamorhiza rosea
                                             Balsamorhiza sagittata
                                             Balsamorhiza sericea
                                             Balsamorhiza serrata
                                             Balsamorhiza terebinthacea
                                             Balsamorhiza tomentosa
                                     Baltimora
                                             Baltimora recta
                                     Barkleyanthus
                                             Barkleyanthus salicifolius
                                                   [Cineraria salicifolia]
                                                   [Senecio salignus]
                                     Bartlettia
                                             Bartlettia scaposa
                                     Bebbia
                                             Bebbia juncea
                                               Bebbia juncea var. aspera
                                     Bellis
                                             Bellis perennis
                                                   [Bellis integrifolia]
                                     Benitoa
                                             Benitoa occidentalis
                                                   [Lessingia occidentalis]
                                     Bensonia
                                     Berkheya
                                             Berkheya heterophylla
                                     Berlandiera
                                             Berlandiera betonicifolia
                                                   [Berlandiera pumila var. scabrella]
                                                   [Berlandiera texana var. betonicifolia]
                                             Berlandiera humilis
                                             Berlandiera lyrata
                                                   [Berlandiera incisa]
                                                   [Berlandiera lyrata var. macrophylla]
                                             Berlandiera macrophylla
                                                   [Berlandiera lyrata var. macrophylla]
                                             Berlandiera pumila
                                                   [Berlandiera dealbata]
                                                   [Berlandiera tomentosa var. dealbata]
                                                   [Berlandiera tomentosa]
                                               Berlandiera pumila var. pumila
                                                     [Berlandiera dealbata]
                                                     [Berlandiera tomentosa var. dealbata]
                                                     [Berlandiera tomentosa]
                                             Berlandiera subacaulis
                                             Berlandiera texana
                                     Berylsimpsonia
                                             Berylsimpsonia vanillosma
                                                   [Proustia krugiana]
                                                   [Proustia vanillosma]
                                     Bidens
                                             Bidens alba
                                               Bidens alba var. radiata
                                                     [Bidens pilosa var. radiata]
                                             Bidens amplectens
                                                   [Bidens gracilis]
                                                   [Bidens halawana]
                                             Bidens andicola
                                             Bidens aristosa
                                                   [Bidens aristosa var. fritcheyi]
                                                   [Bidens aristosa var. mutica]
                                                   [Bidens aristosa var. retrorsa]
                                                   [Bidens involucrata]
                                                   [Bidens polylepis var. retrorsa]
                                             Bidens asymmetrica
                                                   [Bidens gracilis]
                                                   [Bidens halawana]
                                             Bidens aurea
                                                   [Bidens aurea var. wrightii]
                                                   [Bidens ferulifolia]
                                                   [Bidens heterophylla]
                                                   [Coreopsis aurea]
                                                   [Coreopsis ferulifolia]
                                             Bidens beckii
                                                   [Megalodonta beckii var. beckii]
                                                   [Megalodonta beckii var. hendersonii]
                                                   [Megalodonta beckii var. oregonensis]
                                                   [Megalodonta beckii]
                                             Bidens bidentoides
                                                   [Bidens bidentoides var. mariana]
                                                   [Bidens mariana]
                                             Bidens bigelovii
                                               Bidens bigelovii var. angustiloba
                                               Bidens bigelovii var. bigelovii
                                             Bidens bipinnata
                                                   [Bidens bipinnata var. biternatoides]
                                             Bidens campylotheca
                                               Bidens campylotheca subsp. campylotheca
                                                     [Bidens magnidisca]
                                               Bidens campylotheca subsp. pentamera
                                                     [Bidens campylotheca var. pentamera]
                                                     [Bidens pentamera]
                                               Bidens campylotheca subsp. waihoiensis
                                             Bidens cernua
                                                   [Bidens cernua var. dentata]
                                                   [Bidens cernua var. elliptica]
                                                   [Bidens cernua var. integra]
                                                   [Bidens cernua var. minima]
                                                   [Bidens cernua var. oligodonta]
                                                   [Bidens cernua var. radiata]
                                                   [Bidens glaucescens]
                                               Bidens cernua var. cernua
                                             Bidens cervicata
                                                   [Bidens asplenioides]
                                                   [Bidens fecunda]
                                                   [Bidens ferax]
                                                   [Bidens stokesii]
                                             Bidens conjuncta
                                             Bidens connata
                                                   [Bidens connata var. ambiversa]
                                                   [Bidens connata var. anomala]
                                                   [Bidens connata var. fallax]
                                                   [Bidens connata var. gracilipes]
                                                   [Bidens connata var. inundata]
                                                   [Bidens connata var. petiolata]
                                                   [Bidens connata var. pinnata]
                                                   [Bidens connata var. submutica]
                                             Bidens coronata
                                                   [Bidens coronata var. brachyodonta]
                                                   [Bidens coronata var. tenuiloba]
                                                   [Bidens coronata var. trichosperma]
                                             Bidens cosmoides
                                                   [Bidens cosmoides var. refracta]
                                                   [Bidens dimidiata]
                                             Bidens cynapiifolia
                                                   [Bidens bipinnata var. cynapiifolia]
                                                   [Bidens cynapiifolia var. portoricensis]
                                                   [Bidens cynapiifolia var. tenuis]
                                             Bidens discoidea
                                             Bidens eatonii
                                                   [Bidens eatonii var. fallax]
                                                   [Bidens eatonii var. illicita]
                                                   [Bidens eatonii var. interstes]
                                                   [Bidens eatonii var. kennebecensis]
                                                   [Bidens eatonii var. major]
                                                   [Bidens eatonii var. mutabilis]
                                                   [Bidens eatonii var. simulans]
                                             Bidens forbesii
                                               Bidens forbesii subsp. forbesii
                                                     [Bidens asymmetrica var. subocculata]
                                                     [Bidens napaliensis]
                                               Bidens forbesii subsp. kahiliensis
                                             Bidens frondosa
                                                   [Bidens frondosa var. anomala]
                                                   [Bidens frondosa var. caudata]
                                                   [Bidens frondosa var. pallida]
                                                   [Bidens frondosa var. stenodonta]
                                             Bidens gardneri
                                             Bidens hawaiensis
                                                   [Bidens skottsbergii var. conglutinata]
                                                   [Bidens skottsbergii var. pololuensis]
                                                   [Bidens skottsbergii]
                                             Bidens heterodoxa
                                                   [Bidens heterodoxa var. agnostica]
                                                   [Bidens heterodoxa var. atheistica]
                                                   [Bidens heterodoxa var. monardifolia]
                                                   [Bidens heterodoxa var. orthodoxa]
                                                   [Bidens infirma]
                                                   [Bidens tripartita var. heterodoxa]
                                             Bidens heterosperma
                                             Bidens hillebrandiana
                                               Bidens hillebrandiana subsp. hillebrandiana
                                               Bidens hillebrandiana subsp. polycephala
                                             Bidens hyperborea
                                                   [Bidens hyperborea var. cathancensis]
                                                   [Bidens hyperborea var. colpophila]
                                                   [Bidens hyperborea var. svensonii]
                                               Bidens hyperborea var. hyperborea
                                                     [Bidens hyperborea var. colpophila]
                                                     [Bidens hyperborea var. laurentiana]
                                             Bidens laevis
                                                   [Bidens elegans]
                                                   [Bidens nashii]
                                                   [Helianthus laevis]
                                             Bidens lemmonii
                                             Bidens leptocephala
                                             Bidens macrocarpa
                                                   [Bidens macrocarpa var. ovatifolia]
                                             Bidens mauiensis
                                                   [Bidens awaluana]
                                                   [Bidens mauiensis var. ciliata]
                                                   [Bidens mauiensis var. cuneatoides]
                                                   [Bidens mauiensis var. forbesiana]
                                                   [Bidens mauiensis var. lanaiensis]
                                                   [Bidens mauiensis var. media]
                                             Bidens menziesii
                                               Bidens menziesii subsp. filiformis
                                                     [Bidens menziesii var. filiformis]
                                                     [Bidens menziesii var. leptondontia]
                                               Bidens menziesii subsp. menziesii
                                                     [Bidens menziesii var. lepida]
                                                     [Bidens salicoides]
                                             Bidens micrantha
                                               Bidens micrantha subsp. ctenophylla
                                                     [Bidens ctenophylla]
                                               Bidens micrantha subsp. kalealaha
                                                     [Bidens distans]
                                                     [Bidens micrantha var. rudimentifera]
                                               Bidens micrantha subsp. micrantha
                                                     [Bidens ctenophylla]
                                                     [Bidens degeneri var. apioides]
                                                     [Bidens degeneri]
                                                     [Bidens micrantha var. caduca]
                                                     [Bidens micrantha var. kaalana]
                                                     [Bidens micrantha var. laciniata]
                                                     [Bidens perversa var. aquilonalis]
                                                     [Bidens perversa]
                                                     [Bidens sandvicensis var. caduca]
                                                     [Bidens sandvicensis var. leiocarpa]
                                             Bidens mitis
                                                   [Bidens mitis var. leptophylla]
                                             Bidens molokaiensis
                                                   [Bidens cuneata]
                                             Bidens multiceps
                                             Bidens pilosa
                                                   [Bidens odorata]
                                                   [Bidens pilosa var. bimucronata]
                                               Bidens pilosa var. minor
                                               Bidens pilosa var. pilosa
                                             Bidens polylepis
                                                   [Bidens aristosa var. retrorsa]
                                                   [Bidens involucrata]
                                                   [Bidens polylepis var. retrorsa]
                                             Bidens populifolia
                                             Bidens reptans
                                                   [Bidens reptans var. urbanii]
                                                   [Bidens urbanii]
                                                   [Coreopsis reptans]
                                               Bidens reptans var. reptans
                                                     [Coreopsis reptans]
                                             Bidens sandvicensis
                                               Bidens sandvicensis subsp. confusa
                                               Bidens sandvicensis subsp. sandvicensis
                                                     [Bidens coartata]
                                                     [Bidens graciloides]
                                                     [Bidens micranthoides]
                                                     [Bidens obtusiloba]
                                                     [Bidens pulchella]
                                                     [Bidens sandvicensis var. antrorsa]
                                                     [Bidens sandvicensis var. imminuta]
                                                     [Bidens sandvicensis var. setosa]
                                                     [Bidens waimeana]
                                             Bidens sandwicensis
                                               Bidens sandwicensis subsp. sandwicensis
                                                     [Bidens graciloides]
                                                     [Bidens obtusiloba]
                                                     [Bidens pulchella]
                                                     [Bidens sandvicensis var. antrorsa]
                                                     [Bidens sandvicensis var. imminuta]
                                                     [Bidens sandvicensis var. setosa]
                                                     [Bidens waimeana]
                                             Bidens tenuisecta
                                             Bidens torta
                                                   [Bidens fulvescens]
                                                   [Bidens micrantha var. kaalana]
                                                   [Bidens waianensis]
                                             Bidens trichosperma
                                                   [Bidens coronata var. brachyodonta]
                                                   [Bidens coronata var. tenuiloba]
                                                   [Bidens coronata var. trichosperma]
                                             Bidens tripartita
                                                   [Bidens acuta]
                                                   [Bidens comosa]
                                               Bidens tripartita subsp. comosa
                                                     [Bidens comosa]
                                               Bidens tripartita subsp. tripartita
                                                     [Bidens acuta]
                                             Bidens valida
                                             Bidens vulgata
                                                   [Bidens frondosa var. puberula]
                                                   [Bidens puberula]
                                                   [Bidens vulgata var. puberula]
                                                   [Bidens vulgata var. schizantha]
                                             Bidens wiebkei
                                                   [Bidens nematocera]
                                     Bigelowia
                                             Bigelowia nudata
                                                   [Bigelowia virgata]
                                                   [Chondrophora nudata]
                                                   [Chondrophora virgata]
                                                   [Chrysocoma nudata]
                                               Bigelowia nudata subsp. nudata
                                                     [Bigelowia virgata]
                                                     [Chondrophora nudata]
                                                     [Chondrophora virgata]
                                                     [Chrysocoma nudata]
                                               Bigelowia nudata var. australis
                                                     [Bigelowia nudata subsp. australis]
                                             Bigelowia nuttallii
                                     Blainvillea
                                             Blainvillea acmella
                                                   [Verbesina lavenia]
                                     Blennosperma
                                             Blennosperma bakeri
                                             Blennosperma nanum
                                               Blennosperma nanum var. nanum
                                               Blennosperma nanum var. robustum
                                     Blepharipappus
                                             Blepharipappus scaber
                                                   [Blepharipappus scaber subsp. laevis]
                                               Blepharipappus scaber subsp. scaber
                                     Blepharizonia
                                             Blepharizonia laxa
                                                   [Blepharizonia plumosa subsp. viscida]
                                             Blepharizonia plumosa
                                               Blepharizonia plumosa subsp. plumosa
                                     Blumea
                                             Blumea bifoliata
                                                   [Conyza bifoliata]
                                             Blumea sessiliflora
                                             Blumea sinuata
                                                   [Blumea laciniata]
                                             Blumea viscosa
                                                   [Conyza lyrata]
                                                   [Conyza viscosa]
                                                   [Eschenbachia lyrata]
                                     Boltonia
                                             Boltonia apalachicolensis
                                             Boltonia asteroides
                                                   [Boltonia asteroides var. glastifolia]
                                               Boltonia asteroides var. asteroides
                                                     [Boltonia asteroides var. glastifolia]
                                               Boltonia asteroides var. latisquama
                                                     [Boltonia latisquama]
                                               Boltonia asteroides var. recognita
                                                     [Boltonia latisquama var. microcephala]
                                                     [Boltonia latisquama var. occidentalis]
                                                     [Boltonia latisquama var. recognita]
                                                     [Boltonia recognita]
                                             Boltonia caroliniana
                                                   [Boltonia ravenelii]
                                             Boltonia decurrens
                                                   [Boltonia asteroides var. decurrens]
                                                   [Boltonia latisquama var. decurrens]
                                             Boltonia diffusa
                                               Boltonia diffusa var. diffusa
                                               Boltonia diffusa var. interior
                                                     [Boltonia interior]
                                             Boltonia montana
                                     Bombycilaena
                                             Bombycilaena californica
                                                   [Micropus californicus var. californicus]
                                                   [Micropus californicus var. subvestitus]
                                                   [Micropus californicus]
                                               Bombycilaena californica var. californica
                                     Borrichia
                                             Borrichia arborescens
                                                   [Buphthalmum arborescens]
                                             Borrichia cubana
                                             Borrichia frutescens
                                     Bracteantha
                                     Bracyrhamphus
                                     Bradburia
                                             Bradburia hirtella
                                                   [Chrysopsis texana]
                                             Bradburia pilosa
                                                   [Chrysopsis nuttallii]
                                                   [Chrysopsis pilosa]
                                                   [Heterotheca pilosa]
                                     Bradburya
                                     Bramia
                                     Brickellia
                                             Brickellia amplexicaulis
                                                   [Brickellia amplexicaulis var. lanceolata]
                                               Brickellia amplexicaulis var. amplexicaulis
                                             Brickellia atractyloides
                                               Brickellia atractyloides var. arguta
                                                     [Brickellia arguta var. arguta]
                                                     [Brickellia arguta]
                                               Brickellia atractyloides var. odontolepis
                                                     [Brickellia arguta var. odontolepis]
                                             Brickellia baccharidea
                                             Brickellia betonicifolia
                                             Brickellia brachyphylla
                                               Brickellia brachyphylla var. brachyphylla
                                             Brickellia californica
                                                   [Brickellia californica var. jepsonii]
                                                   [Bulbostylis californica]
                                               Brickellia californica var. californica
                                                     [Bulbostylis californica]
                                             Brickellia chenopodina
                                             Brickellia cordifolia
                                                   [Coleosanthus cordifolius]
                                             Brickellia coulteri
                                             Brickellia cylindracea
                                             Brickellia dentata
                                             Brickellia desertorum
                                                   [Brickellia californica var. desertorum]
                                                   [Coleosanthus desertorum]
                                             Brickellia diffusa
                                                   [Eupatorium aromaticum]
                                             Brickellia eupatorioides
                                                   [Kuhnia eupatorioides var. angustifolia]
                                                   [Kuhnia eupatorioides var. pyramidalis]
                                                   [Kuhnia eupatorioides]
                                                   [Kuhnia glutinosa]
                                                   [Kuhnia hitchcockii]
                                               Brickellia eupatorioides var. chlorolepis
                                                     [Brickellia chlorolepis]
                                                     [Brickellia leptophylla var. mexicana]
                                                     [Brickellia rosemarinifolia var. chlorolepis]
                                                     [Brickellia rosmarinifolia subsp. chlorolepis]
                                                     [Brickellia rosmarinifolia]
                                                     [Brickellia shaffneri]
                                                     [Kuhnia chlorolepis]
                                                     [Kuhnia eupatorioides var. chlorolepis]
                                                     [Kuhnia leptophylla var. mexicana]
                                                     [Kuhnia leptophylla]
                                                     [Kuhnia microphylla]
                                                     [Kuhnia rosemarinifolia var. chlorolepis]
                                                     [Kuhnia rosmarinifolia var. chlorolepis]
                                                     [Kuhnia rosmarinifolia]
                                                     [Kuhnia shaffneri]
                                               Brickellia eupatorioides var. corymbulosa
                                                     [Kuhnia eupatorioides var. corymbulosa]
                                                     [Kuhnia hitchcockii]
                                               Brickellia eupatorioides var. eupatorioides
                                                     [Brickellia rosemarinifolia]
                                                     [Brickellia rosmarinifolia]
                                                     [Kuhnia eupatorioides var. angustifolia]
                                                     [Kuhnia eupatorioides var. gracilis]
                                                     [Kuhnia eupatorioides var. pyramidalis]
                                                     [Kuhnia eupatorioides]
                                                     [Kuhnia glutinosa]
                                                     [Kuhnia rosemarinifolia]
                                                     [Kuhnia rosmarinifolia]
                                               Brickellia eupatorioides var. floridana
                                                     [Brickellia mosieri]
                                                     [Kuhnia eupatorioides var. floridana]
                                                     [Kuhnia eupatorioides var. gracilis]
                                                     [Kuhnia mosieri]
                                               Brickellia eupatorioides var. gracillima
                                                     [Brickellia leptophylla]
                                                     [Kuhnia eupatorioides var. gracillima]
                                                     [Kuhnia leptophylla]
                                               Brickellia eupatorioides var. texana
                                                     [Brickellia eupatorioides var. ozarkana]
                                                     [Kuhnia eupatorioides var. ozarkana]
                                                     [Kuhnia eupatorioides var. texana]
                                             Brickellia floribunda
                                             Brickellia frutescens
                                             Brickellia grandiflora
                                                   [Brickellia grandiflora var. petiolaris]
                                                   [Coleosanthus grandiflorus]
                                             Brickellia greenei
                                             Brickellia hinckleyi
                                                   [Brickellia brachyphylla var. hinckleyi]
                                               Brickellia hinckleyi var. hinckleyi
                                                     [Brickellia brachyphylla var. hinckleyi]
                                               Brickellia hinckleyi var. terlinguensis
                                                     [Brickellia brachyphylla var. terlinguensis]
                                             Brickellia incana
                                             Brickellia knappiana
                                             Brickellia laciniata
                                             Brickellia lemmonii
                                                   [Brickellia lemmonii var. wootonii]
                                               Brickellia lemmonii var. conduplicata
                                                     [Brickellia conduplicata]
                                                     [Brickellia viejensis]
                                               Brickellia lemmonii var. lemmonii
                                                     [Brickellia viejensis]
                                               Brickellia lemmonii var. nelsonii
                                             Brickellia longifolia
                                               Brickellia longifolia var. longifolia
                                               Brickellia longifolia var. multiflora
                                                     [Brickellia multiflora]
                                             Brickellia microphylla
                                                   [Brickellia microphylla var. watsonii]
                                                   [Brickellia watsonii]
                                               Brickellia microphylla var. microphylla
                                               Brickellia microphylla var. scabra
                                                     [Brickellia microphylla subsp. scabra]
                                                     [Brickellia scabra]
                                             Brickellia nevinii
                                             Brickellia oblongifolia
                                               Brickellia oblongifolia var. linifolia
                                                     [Brickellia linifolia]
                                               Brickellia oblongifolia var. oblongifolia
                                                     [Brickellia oblongifolia var. typica]
                                             Brickellia parvula
                                             Brickellia pringlei
                                             Brickellia rusbyi
                                             Brickellia simplex
                                             Brickellia venosa
                                                   [Coleosanthus venosus]
                                             Brickellia veronicifolia
                                                   [Brickellia veronicifolia var. petrophila]
                                                   [Eupatorium veronicifolium]
                                               Brickellia veronicifolia var. veronicifolia
                                                     [Eupatorium veronicifolium]
                                     Brickelliastrum
                                             Brickelliastrum fendleri
                                                   [Brickellia fendleri]
                                                   [Eriocarpum wootonii]
                                                   [Eupatorium fendleri]
                                     Brintonia
                                             Brintonia discoidea
                                                   [Solidago discoidea]
                                     Buphthalmum
                                     Cacaliopsis
                                             Cacaliopsis nardosmia
                                                   [Cacalia nardosmia var. glabrata]
                                                   [Cacalia nardosmia]
                                                   [Cacaliopsis nardosmia var. glabrata]
                                                   [Luina nardosmia subsp. glabrata]
                                                   [Luina nardosmia var. glabrata]
                                                   [Luina nardosmia]
                                     Cacara
                                     Caconapea
                                     Calea
                                     Calendula
                                             Calendula arvensis
                                             Calendula officinalis
                                                   [Calendula officinalis var. prolifera]
                                     Callistephus
                                             Callistephus chinensis
                                                   [Aster chinensis]
                                     Calotis
                                             Calotis cuneifolia
                                     Calycadenia
                                             Calycadenia fremontii
                                                   [Calycadenia ciliosa]
                                                   [Calycadenia elegans]
                                                   [Calycadenia pauciflora var. elegans]
                                                   [Hemizonia fremontii]
                                                   [Hemizonia multiglandulosa var. sparsa]
                                             Calycadenia hooveri
                                             Calycadenia micrantha
                                             Calycadenia mollis
                                                   [Hemizonia mollis]
                                             Calycadenia multiglandulosa
                                                   [Calycadenia campestris]
                                                   [Calycadenia hispida subsp. reducta]
                                                   [Calycadenia hispida]
                                                   [Calycadenia multiglandulosa subsp. bicolor]
                                                   [Calycadenia multiglandulosa subsp. cephalotes]
                                                   [Calycadenia multiglandulosa subsp. robusta]
                                                   [Hemizonia hispida]
                                             Calycadenia oppositifolia
                                                   [Hemizonia oppositifolia]
                                             Calycadenia pauciflora
                                                   [Calycadenia elegans]
                                                   [Calycadenia pauciflora var. elegans]
                                                   [Calycadenia ramulosa]
                                                   [Hemizonia pauciflora]
                                             Calycadenia spicata
                                                   [Hemizonia spicata]
                                             Calycadenia truncata
                                                   [Calycadenia scabrella]
                                                   [Calycadenia truncata subsp. microcephala]
                                                   [Calycadenia truncata subsp. scabrella]
                                                   [Calycadenia truncata var. scabrella]
                                                   [Hemizonia scabrella]
                                                   [Hemizonia truncata]
                                                   [Lagophylla scabrella]
                                               Calycadenia truncata subsp. truncata
                                                     [Hemizonia truncata]
                                             Calycadenia villosa
                                                   [Hemizonia douglasii]
                                     Calycoseris
                                             Calycoseris parryi
                                             Calycoseris wrightii
                                     Calyptocarpus
                                             Calyptocarpus vialis
                                                   [Synedrella vialis]
                                     Calyptracordia
                                     Canadanthus
                                             Canadanthus modestus
                                                   [Aster major]
                                                   [Aster modestus]
                                                   [Aster unalaschkensis var. major]
                                                   [Weberaster modestus]
                                     Carduus
                                             Carduus acanthoides
                                             Carduus crispus
                                             Carduus macrocephalus
                                                   [Carduus nutans var. macrocephalus]
                                             Carduus nutans
                                                   [Carduus macrolepis]
                                                   [Carduus nutans subsp. macrolepis]
                                                   [Carduus nutans var. leiophyllus]
                                                   [Carduus nutans var. macrocephalus]
                                                   [Carduus nutans var. vestitus]
                                               Carduus nutans subsp. leiophyllus
                                               Carduus nutans subsp. macrocephalus
                                               Carduus nutans subsp. nutans
                                                     [Carduus macrolepis]
                                                     [Carduus nutans subsp. macrolepis]
                                                     [Carduus nutans var. vestitus]
                                             Carduus orthocephalus
                                             Carduus pumilus
                                             Carduus pycnocephalus
                                             Carduus tenuiflorus
                                     Carlina
                                             Carlina vulgaris
                                               Carlina vulgaris subsp. vulgaris
                                                     [Carlina vulgaris subsp. longifolia]
                                     Carlquistia
                                             Carlquistia muirii
                                                   [Raillardella muirii]
                                                   [Raillardiopsis muirii]
                                     Carminatia
                                             Carminatia tenuiflora
                                     Carphephorus
                                             Carphephorus bellidifolius
                                             Carphephorus carnosus
                                                   [Litrisa carnosa]
                                             Carphephorus corymbosus
                                             Carphephorus odoratissimus
                                                   [Trilisa odoratissima]
                                             Carphephorus paniculatus
                                                   [Trilisa paniculata]
                                             Carphephorus pseudoliatris
                                             Carphephorus tomentosus
                                                   [Carphephorus tomentosus var. walteri]
                                     Carphochaete
                                             Carphochaete bigelovii
                                     Carthamus
                                             Carthamus creticus
                                                   [Carthamus baeticus]
                                                   [Carthamus lanatus subsp. baeticus]
                                                   [Carthamus lanatus subsp. creticus]
                                             Carthamus lanatus
                                               Carthamus lanatus subsp. lanatus
                                             Carthamus leucocaulos
                                             Carthamus oxyacanthus
                                                   [Carthamus oxyacantha]
                                             Carthamus tinctorius
                                     Castalis
                                     Catananche
                                             Catananche caerulea
                                     Centaurea
                                             Centaurea aspera
                                             Centaurea austriaca
                                             Centaurea babylonica
                                             Centaurea benedicta
                                                   [Cnicus benedictus]
                                             Centaurea bovina
                                             Centaurea calcitrapa
                                             Centaurea calcitrapoides
                                             Centaurea cineraria
                                             Centaurea cyanus
                                                   [Leucacantha cyanus]
                                             Centaurea debeauxii
                                               Centaurea debeauxii subsp. grandiflora
                                                     [Centaurea debeauxii subsp. thuillieri]
                                             Centaurea depressa
                                             Centaurea diffusa
                                                   [Acosta diffusa]
                                             Centaurea diluta
                                             Centaurea eriophora
                                                   [Jacea pratensis]
                                             Centaurea iberica
                                             Centaurea jacea
                                               Centaurea jacea subsp. jacea
                                                     [Centaurea pratensis]
                                                     [Jacea pratensis]
                                             Centaurea macrocephala
                                             Centaurea melitensis
                                             Centaurea moncktonii
                                             Centaurea montana
                                                   [Centaurea montana var. alba]
                                             Centaurea nervosa
                                               Centaurea nervosa subsp. nervosa
                                                     [Centaurea uniflora subsp. nervosa]
                                             Centaurea nigra
                                                   [Centaurea nigra var. radiata]
                                               Centaurea nigra subsp. endressii
                                                     [Centaurea nigra var. radiata]
                                             Centaurea nigrescens
                                                   [Centaurea debeauxii subsp. thuillieri]
                                                   [Centaurea dubia subsp. vochinensis]
                                                   [Centaurea pratensis]
                                                   [Centaurea vochinensis]
                                               Centaurea nigrescens subsp. transalpina
                                                     [Centaurea dubia]
                                                     [Centaurea transalpina]
                                               Centaurea nigrescens subsp. vochinensis
                                                     [Centaurea dubia subsp. vochinensis]
                                                     [Centaurea vochinensis]
                                             Centaurea paniculata
                                             Centaurea phrygia
                                             Centaurea pouzinii
                                             Centaurea pullata
                                               Centaurea pullata subsp. pullata
                                             Centaurea reichenbachii
                                                   [Centaurea biebersteinii]
                                             Centaurea scabiosa
                                                   [Centaurea scabiosa var. vertesensis]
                                             Centaurea solstitialis
                                                   [Leucantha solstitialis]
                                               Centaurea solstitialis subsp. solstitialis
                                                     [Leucantha solstitialis]
                                             Centaurea stoebe
                                               Centaurea stoebe subsp. australis
                                                     [Centaurea stoebe subsp. micranthos]
                                               Centaurea stoebe subsp. stoebe
                                                     [Centaurea maculosa]
                                             Centaurea sulphurea
                                             Centaurea trichocephala
                                             Centaurea triumfettii
                                             Centaurea uniflora
                                             Centaurea variegata
                                             Centaurea virgata
                                               Centaurea virgata subsp. squarrosa
                                                     [Centaurea squarrosa]
                                                     [Centaurea virgata var. squarrosa]
                                     Centaurella
                                     Centipeda
                                             Centipeda minima
                                                   [Artemisia minima]
                                               Centipeda minima subsp. minima
                                                     [Artemisia minima]
                                     Centratherum
                                             Centratherum punctatum
                                     Centrogenium
                                     Centromadia
                                             Centromadia fitchii
                                                   [Hemizonia fitchii]
                                             Centromadia parryi
                                               Centromadia parryi subsp. australis
                                                     [Hemizonia australis]
                                                     [Hemizonia parryi subsp. australis]
                                               Centromadia parryi subsp. congdonii
                                                     [Hemizonia parryi subsp. congdonii]
                                               Centromadia parryi subsp. parryi
                                                     [Hemizonia parryi subsp. parryi]
                                                     [Hemizonia parryi]
                                               Centromadia parryi subsp. rudis
                                                     [Hemizonia parryi subsp. rudis]
                                             Centromadia pungens
                                               Centromadia pungens subsp. laevis
                                                     [Hemizonia laevis]
                                                     [Hemizonia pungens subsp. laevis]
                                               Centromadia pungens subsp. pungens
                                                     [Centromadia pungens subsp. maritima]
                                                     [Centromadia pungens subsp. septentrionalis]
                                                     [Hemizonia pungens subsp. maritima]
                                                     [Hemizonia pungens subsp. pungens]
                                                     [Hemizonia pungens subsp. septentrionalis]
                                                     [Hemizonia pungens var. septentrionalis]
                                                     [Hemizonia pungens]
                                     Chaenactis
                                             Chaenactis alpigena
                                             Chaenactis artemisiifolia
                                             Chaenactis carphoclinia
                                                   [Chaenactis carphoclinia var. attenuata]
                                               Chaenactis carphoclinia var. carphoclinia
                                                     [Chaenactis carphoclinia var. attenuata]
                                               Chaenactis carphoclinia var. peirsonii
                                             Chaenactis cusickii
                                             Chaenactis douglasii
                                                   [Chaenactis angustifolia]
                                                   [Chaenactis brachiata]
                                                   [Chaenactis douglasii var. achilleifolia]
                                                   [Chaenactis douglasii var. glandulosa]
                                                   [Chaenactis douglasii var. montana]
                                                   [Chaenactis douglasii var. nana]
                                                   [Chaenactis douglasii var. rubricaulis]
                                                   [Chaenactis humilis]
                                                   [Chaenactis ramosa]
                                                   [Chaenactis rubricaulis]
                                                   [Chaenactis suksdorfii]
                                                   [Hymenopappus carolinensis]
                                               Chaenactis douglasii var. alpina
                                                     [Chaenactis alpina var. leucopsis]
                                                     [Chaenactis alpina var. rubella]
                                                     [Chaenactis alpina]
                                                     [Chaenactis leucopsis]
                                                     [Chaenactis minuscula]
                                               Chaenactis douglasii var. douglasii
                                                     [Chaenactis angustifolia]
                                                     [Chaenactis brachiata var. stansburiana]
                                                     [Chaenactis brachiata]
                                                     [Chaenactis cineria]
                                                     [Chaenactis douglasii var. achilleifolia]
                                                     [Chaenactis douglasii var. glandulosa]
                                                     [Chaenactis douglasii var. montana]
                                                     [Chaenactis douglasii var. nana]
                                                     [Chaenactis douglasii var. rubricaulis]
                                                     [Chaenactis douglasii var. typicus]
                                                     [Chaenactis humilis]
                                                     [Chaenactis panamintensis]
                                                     [Chaenactis ramosa]
                                                     [Chaenactis rubricaulis]
                                                     [Chaenactis suksdorfii]
                                             Chaenactis evermannii
                                                   [Chaenactis nevadensis var. mainsiana]
                                             Chaenactis fremontii
                                             Chaenactis glabriuscula
                                                   [Chaenactis glabriuscula var. aurea]
                                                   [Chaenactis glabriuscula var. curta]
                                                   [Chaenactis glabriuscula var. tenuifolia]
                                                   [Chaenactis tenuifolia]
                                               Chaenactis glabriuscula var. glabriuscula
                                                     [Chaenactis furcata]
                                                     [Chaenactis glabriuscula var. aurea]
                                                     [Chaenactis glabriuscula var. curta]
                                                     [Chaenactis glabriuscula var. tenuifolia]
                                                     [Chaenactis tenuifolia]
                                               Chaenactis glabriuscula var. heterocarpha
                                                     [Chaenactis glabriuscula var. gracilenta]
                                                     [Chaenactis heterocarpha]
                                                     [Chaenactis tanacetifolia var. gracilenta]
                                                     [Chaenactis tanacetifolia]
                                               Chaenactis glabriuscula var. lanosa
                                                     [Chaenactis glabriuscula var. denudata]
                                                     [Chaenactis lanosa]
                                               Chaenactis glabriuscula var. megacephala
                                               Chaenactis glabriuscula var. orcuttiana
                                                     [Chaenactis orcuttiana]
                                                     [Chaenactis tenuifolia var. orcuttiana]
                                             Chaenactis macrantha
                                             Chaenactis nevadensis
                                             Chaenactis nevii
                                             Chaenactis parishii
                                             Chaenactis santolinoides
                                                   [Chaenactis santolinoides var. indurata]
                                             Chaenactis stevioides
                                                   [Chaenactis furcata]
                                                   [Chaenactis gillespiei]
                                                   [Chaenactis latifolia]
                                                   [Chaenactis mexicana]
                                                   [Chaenactis stevioides var. brachypappa]
                                                   [Chaenactis stevioides var. thornberi]
                                             Chaenactis suffrutescens
                                                   [Chaenactis suffrutescens var. incana]
                                             Chaenactis thompsonii
                                             Chaenactis xantiana
                                     Chaetadelpha
                                             Chaetadelpha wheeleri
                                     Chaetochloa
                                     Chaetopappa
                                             Chaetopappa asteroides
                                               Chaetopappa asteroides var. asteroides
                                               Chaetopappa asteroides var. grandis
                                             Chaetopappa bellidifolia
                                                   [Keerlia bellidifolia]
                                             Chaetopappa bellioides
                                                   [Chaetopappa bellioides var. hirticaulis]
                                                   [Diplostelma bellioides]
                                             Chaetopappa effusa
                                                   [Keerlia effusa]
                                             Chaetopappa ericoides
                                                   [Aster arenosus]
                                                   [Aster ericaefolius]
                                                   [Aster hirtifolius]
                                                   [Aster leucelene]
                                                   [Inula ericoides]
                                                   [Leucelene ericoides]
                                             Chaetopappa hersheyi
                                             Chaetopappa imberbis
                                                   [Chaetopappa asteroides var. imberbis]
                                             Chaetopappa parryi
                                     Chaetotropis
                                     Chamaechaenactis
                                             Chamaechaenactis scaposa
                                                   [Chaenactis scaposa]
                                                   [Chamaechaenactis scaposa var. parva]
                                               Chamaechaenactis scaposa var. scaposa
                                                     [Chaenactis scaposa]
                                     Chamaecistus
                                     Chamaemelum
                                             Chamaemelum fuscatum
                                                   [Anthemis fuscata]
                                             Chamaemelum nobile
                                                   [Anthemis nobilis]
                                     Chamaenerion
                                             Chamaenerion angustifolium
                                     Chamaepericlymenum
                                     Chamaephoenix
                                     Chaptalia
                                             Chaptalia albicans
                                             Chaptalia dentata
                                             Chaptalia nutans
                                                   [Tussilago nutans]
                                             Chaptalia texana
                                                   [Chaptalia nutans var. texana]
                                             Chaptalia tomentosa
                                     Chloracantha
                                             Chloracantha spinosa
                                                   [Aster spinosus]
                                                   [Erigeron ortegae]
                                                   [Leucosyris spinosa]
                                               Chloracantha spinosa var. spinosa
                                     Chondrilla
                                             Chondrilla juncea
                                     Chondrophora
                                     Chondrophylla
                                     Chondrosea
                                     Chondrosum
                                     Choretis
                                     Chorisiva
                                     Chromolaena
                                             Chromolaena bigelovii
                                                   [Eupatorium bigelovii]
                                             Chromolaena borinquensis
                                                   [Eupatorium borinquense]
                                                   [Osmia borinquensis]
                                             Chromolaena corymbosa
                                                   [Eupatorium corymbosum]
                                                   [Osmia corymbosa]
                                             Chromolaena frustrata
                                                   [Eupatorium frustratum]
                                                   [Osmia frustrata]
                                             Chromolaena geraniifolia
                                                   [Eupatorium geraniifolium]
                                                   [Osmia geraniifolia]
                                             Chromolaena ivifolia
                                                   [Eupatorium ivifolium]
                                                   [Osmia ivifolia]
                                             Chromolaena odorata
                                                   [Eupatorium odoratum]
                                                   [Osmia odorata]
                                             Chromolaena oteroi
                                                   [Eupatorium oteroi]
                                             Chromolaena sinuata
                                                   [Eupatorium sinuatum]
                                                   [Osmia sinuata]
                                     Chrosperma
                                     Chrysactinia
                                             Chrysactinia mexicana
                                     Chrysalidocarpus
                                     Chrysamphora
                                     Chrysanthemum
                                             Chrysanthemum morifolium
                                                   [Dendranthema grandiflorum]
                                                   [Dendranthema morifolium]
                                             Chrysanthemum nipponicum
                                             Chrysanthemum parthenium
                                             Chrysanthemum vulgare
                                     Chrysocoma
                                     Chrysogonum
                                             Chrysogonum virginianum
                                                   [Chrysogonum virginianum var. dentatum]
                                               Chrysogonum virginianum var. australe
                                                     [Chrysogonum australe]
                                               Chrysogonum virginianum var. brevistolon
                                               Chrysogonum virginianum var. virginianum
                                                     [Chrysogonum virginianum var. dentatum]
                                     Chrysoma
                                             Chrysoma pauciflosculosa
                                                   [Chrysoma solidaginoides]
                                                   [Solidago pauciflosculosa]
                                     Chrysopsis
                                             Chrysopsis floridana
                                                   [Chrysopsis mariana var. floridana]
                                                   [Heterotheca floridana]
                                                   [Heterotheca mariana subsp. floridana]
                                             Chrysopsis godfreyi
                                             Chrysopsis gossypina
                                               Chrysopsis gossypina subsp. cruiseana
                                                     [Chrysopsis cruiseana]
                                                     [Heterotheca cruiseana]
                                               Chrysopsis gossypina subsp. gossypina
                                                     [Chrysopsis arenicola]
                                                     [Chrysopsis decumbens]
                                                     [Chrysopsis longii]
                                                     [Chrysopsis trichophylla]
                                                     [Heterotheca gossypina]
                                                     [Heterotheca trichophylla]
                                                     [Inula gossypina]
                                               Chrysopsis gossypina subsp. hyssopifolia
                                                     [Chrysopsis gigantea]
                                                     [Chrysopsis hyssopifolia]
                                                     [Chrysopsis mixta]
                                                     [Heterotheca hyssopifolia var. gigantea]
                                             Chrysopsis lanuginosa
                                             Chrysopsis latisquamea
                                                   [Heterotheca latisquamea]
                                             Chrysopsis linearifolia
                                               Chrysopsis linearifolia subsp. linearifolia
                                               Chrysopsis linearifolia var. dressii
                                                     [Chrysopsis linearifolia subsp. dressii]
                                             Chrysopsis mariana
                                                   [Chrysopsis mariana var. macradenia]
                                                   [Heterotheca mariana var. macradenia]
                                                   [Heterotheca mariana]
                                                   [Inula mariana]
                                             Chrysopsis scabrella
                                             Chrysopsis subulata
                                                   [Heterotheca hyssopifolia var. subulata]
                                                   [Heterotheca subulata]
                                             Chrysopsis villosa
                                                   [Chrysopsis villosa/Symphyotrichum ericoides]
                                     Chrysothamnus
                                             Chrysothamnus depressus
                                                   [Ericameria depressa]
                                             Chrysothamnus eremobius
                                                   [Ericameria eremobia]
                                             Chrysothamnus greenei
                                                   [Chrysothamnus greenei subsp. filifolius]
                                                   [Chrysothamnus greenei var. filifolius]
                                                   [Ericameria filifolia]
                                             Chrysothamnus humilis
                                                   [Chrysothamnus viscidiflorus subsp. humilis]
                                                   [Chrysothamnus viscidiflorus var. humilis]
                                                   [Ericameria humilis]
                                             Chrysothamnus molestus
                                                   [Chrysothamnus viscidiflorus var. molestus]
                                                   [Ericameria molesta]
                                             Chrysothamnus scopulorum
                                                   [Haplopappus scopulorum var. hirtellus]
                                                   [Hesperodoria scopulorum]
                                             Chrysothamnus stylosus
                                                   [Grindelia stylosa]
                                                   [Vanclevea stylosa]
                                             Chrysothamnus vaseyi
                                                   [Bigelovia vaseyi]
                                                   [Ericameria vaseyi]
                                             Chrysothamnus viscidiflorus
                                               Chrysothamnus viscidiflorus subsp. axillaris
                                                     [Chrysothamnus axillaris]
                                                     [Ericameria viscidiflora subsp. axillaris]
                                               Chrysothamnus viscidiflorus subsp. lanceolatus
                                                     [Chrysothamnus viscidiflorus subsp. elegans]
                                                     [Chrysothamnus viscidiflorus var. elegans]
                                                     [Chrysothamnus viscidiflorus var. lanceolatus]
                                                     [Ericameria viscidiflora subsp. lanceolata]
                                               Chrysothamnus viscidiflorus subsp. planifolius
                                                     [Ericameria viscidiflora subsp. planifolia]
                                               Chrysothamnus viscidiflorus subsp. puberulus
                                                     [Chrysothamnus viscidiflorus var. puberulus]
                                                     [Ericameria viscidiflora subsp. puberula]
                                               Chrysothamnus viscidiflorus subsp. viscidiflorus
                                                     [Chrysothamnus viscidiflorus subsp. latifolius]
                                                     [Chrysothamnus viscidiflorus subsp. pumilus]
                                                     [Chrysothamnus viscidiflorus subsp. stenophyllus]
                                                     [Chrysothamnus viscidiflorus var. latifolius]
                                                     [Chrysothamnus viscidiflorus var. pumilus]
                                                     [Chrysothamnus viscidiflorus var. stenophyllus]
                                                     [Ericameria viscidiflora var. latifolia]
                                                     [Ericameria viscidiflora var. stenophylla]
                                                     [Ericameria viscidiflora]
                                               Chrysothamnus viscidiflorus var. viscidiflorus
                                                     [Chrysothamnus viscidiflorus subsp. pumilus]
                                                     [Chrysothamnus viscidiflorus subsp. typicus]
                                                     [Chrysothamnus viscidiflorus var. pumilus]
                                                     [Chrysothamnus viscidiflorus var. typicus]
                                                     [Ericameria viscidiflora]
                                     Cicerbita
                                             Cicerbita alpina
                                                   [Lactuca spicata]
                                     Cichorium
                                             Cichorium endivia
                                             Cichorium intybus
                                                   [Cichorium intybus var. foliosum]
                                                   [Cichorium intybus var. sativum]
                                     Cineraria
                                     Cirsium
                                             Cirsium acaule
                                             Cirsium altissimum
                                                   [Carduus altissimus]
                                                   [Cirsium altissimum var. biltmoreanum]
                                             Cirsium andersonii
                                             Cirsium andrewsii
                                                   [Cnicus amplifolius]
                                             Cirsium arizonicum
                                                   [Cirsium arizonicum var. nidulum]
                                                   [Cirsium nidulum]
                                                   [Cnicus arizonicus]
                                               Cirsium arizonicum var. arizonicum
                                               Cirsium arizonicum var. bipinnatum
                                                     [Carduus pulchellus]
                                                     [Cirsium bipinnatum]
                                                     [Cirsium calcareum var. bipinnatum]
                                                     [Cirsium calcareum var. pulchellum]
                                                     [Cirsium calcareum]
                                                     [Cirsium diffusum]
                                                     [Cirsium pulchellum subsp. bipinnatum]
                                                     [Cirsium pulchellum subsp. diffusum]
                                                     [Cirsium pulchellum var. glabrescens]
                                                     [Cirsium pulchellum]
                                                     [Cnicus calcareus]
                                               Cirsium arizonicum var. chellyense
                                                     [Cirsium chellyense]
                                                     [Cirsium chuskaense]
                                                     [Cirsium navajoense]
                                               Cirsium arizonicum var. rothrockii
                                                     [Cirsium rothrockii]
                                             Cirsium arvense
                                                   [Breea arvensis]
                                                   [Breea incana]
                                                   [Carduus arvensis]
                                                   [Cirsium arvense var. argenteum]
                                                   [Cirsium arvense var. horridum]
                                                   [Cirsium arvense var. mite]
                                                   [Cirsium incanum]
                                                   [Cirsium setosum]
                                                   [Serratula arvensis]
                                               Cirsium arvense var. integrifolium
                                                     [Cirsium arvense var. mite]
                                                     [Cirsium setosum]
                                               Cirsium arvense var. vestitum
                                                     [Cirsium arvense var. argenteum]
                                                     [Cirsium incanum]
                                             Cirsium barnebyi
                                             Cirsium botryodes
                                                   [Cirsium griseum]
                                             Cirsium brevifolium
                                                   [Cirsium palousense]
                                             Cirsium brevistylum
                                             Cirsium callilepis
                                             Cirsium canescens
                                                   [Carduus undulatus var. canescens]
                                                   [Cirsium nebraskense]
                                                   [Cirsium nelsonii]
                                                   [Cirsium plattense]
                                             Cirsium canovirens
                                             Cirsium canum
                                             Cirsium carolinianum
                                                   [Carduus carolinianus]
                                                   [Cirsium flaccidum]
                                             Cirsium ciliolatum
                                                   [Cirsium botrys]
                                                   [Cirsium howellii]
                                             Cirsium clavatum
                                               Cirsium clavatum var. americanum
                                                     [Carduus spathulatus]
                                                     [Cirsium centaureae]
                                                     [Cirsium laterifolium]
                                                     [Cirsium modestum]
                                                     [Cirsium scapanolepis]
                                                     [Cirsium spathulifolium]
                                               Cirsium clavatum var. osterhoutii
                                                     [Carduus araneosus]
                                                     [Cirsium araneans]
                                                     [Cirsium osterhoutii]
                                             Cirsium crassicaule
                                             Cirsium cymosum
                                                   [Cirsium botrys]
                                                   [Cirsium triacanthum]
                                             Cirsium discolor
                                                   [Carduus discolor]
                                             Cirsium douglasii
                                                   [Cirsium breweri var. wrangelii]
                                               Cirsium douglasii var. breweri
                                                     [Cirsium breweri var. lanosissimum]
                                                     [Cirsium breweri]
                                                     [Cirsium douglasii var. canescens]
                                                     [Cnicus breweri]
                                               Cirsium douglasii var. douglasii
                                                     [Cirsium breweri var. wrangelii]
                                             Cirsium drummondii
                                                   [Cirsium coccinatum]
                                                   [Cnicus drummondii]
                                             Cirsium eatonii
                                                   [Cirsium eatonii var. harrisonii]
                                                   [Cirsium eriocephalum var. leiocephalum]
                                                   [Cirsium hookerianum var. eriocephalum]
                                                   [Cirsium olivescens]
                                                   [Cirsium polyphyllum]
                                                   [Cirsium tweedyi]
                                               Cirsium eatonii var. clokeyi
                                                     [Cirsium clokeyi]
                                               Cirsium eatonii var. eriocephalum
                                                     [Cirsium eriocephalum]
                                                     [Cirsium scopulorum]
                                               Cirsium eatonii var. hesperium
                                                     [Cirsium hesperium]
                                               Cirsium eatonii var. murdockii
                                                     [Cirsium murdockii]
                                                     [Cirsium polyphyllum]
                                                     [Cirsium tweedyi]
                                               Cirsium eatonii var. peckii
                                                     [Cirsium peckii]
                                             Cirsium edule
                                                   [Carduus macounii]
                                                   [Cirsium hallii]
                                                   [Cirsium macounii]
                                               Cirsium edule var. macounii
                                                     [Carduus macounii]
                                                     [Cirsium macounii]
                                             Cirsium engelmannii
                                                   [Cirsium altissimum var. filipendulum]
                                                   [Cirsium terraenigrae]
                                             Cirsium filipendulum
                                             Cirsium flodmanii
                                                   [Cirsium nebraskense var. discissum]
                                                   [Cirsium oblanceolatum]
                                             Cirsium foliosum
                                                   [Cirsium foliosum var. minganense]
                                             Cirsium fontinale
                                               Cirsium fontinale var. campylon
                                                     [Cirsium campylon]
                                               Cirsium fontinale var. fontinale
                                               Cirsium fontinale var. obispoense
                                             Cirsium grahamii
                                             Cirsium hookerianum
                                                   [Cirsium kelseyi]
                                             Cirsium horridulum
                                                   [Cirsium horridulum var. elliottii]
                                               Cirsium horridulum var. horridulum
                                                     [Carduus pinetorum]
                                                     [Carduus smallii]
                                                     [Carduus spinosissimus]
                                                     [Cirsium horridulum var. elliottii]
                                                     [Cirsium smallii]
                                               Cirsium horridulum var. vittatum
                                                     [Carduus pinetorum]
                                                     [Carduus smallii]
                                                     [Cirsium smallii]
                                                     [Cirsium vittatum]
                                             Cirsium hydrophilum
                                                   [Cirsium vaseyi var. hydrophilum]
                                               Cirsium hydrophilum var. hydrophilum
                                                     [Cirsium vaseyi var. hydrophilum]
                                               Cirsium hydrophilum var. vaseyi
                                                     [Cirsium montigenum]
                                                     [Cirsium vaseyi]
                                                     [Cnicus breweri var. vaseyi]
                                             Cirsium inamoenum
                                                   [Carduus inamoenus]
                                               Cirsium inamoenum var. davisii
                                                     [Cirsium davisii]
                                             Cirsium iowense
                                             Cirsium kamtschaticum
                                             Cirsium lanceolatum
                                             Cirsium lecontei
                                                   [Carduus lecontei]
                                             Cirsium lineare
                                             Cirsium longistylum
                                             Cirsium maritimum
                                             Cirsium mexicanum
                                             Cirsium mohavense
                                                   [Cirsium rusbyi]
                                             Cirsium muticum
                                                   [Carduus muticus]
                                                   [Cirsium bigelovii]
                                                   [Cirsium muticum var. monticola]
                                                   [Cirsium muticum var. subpinnatifidum]
                                             Cirsium neomexicanum
                                                   [Carduus inamoenus]
                                                   [Cirsium arcuum]
                                                   [Cirsium humboldtense]
                                                   [Cirsium neomexicanum var. utahense]
                                                   [Cirsium utahense]
                                                   [Cirsium wallowense]
                                               Cirsium neomexicanum var. neomexicanum
                                             Cirsium nuttalii
                                                   [Carduus nuttallii]
                                             Cirsium nuttallii
                                                   [Carduus nuttallii]
                                             Cirsium occidentale
                                               Cirsium occidentale var. californicum
                                                     [Cirsium californicum subsp. pseudoreglense]
                                                     [Cirsium californicum var. bernardinum]
                                                     [Cirsium californicum]
                                               Cirsium occidentale var. candidissimum
                                                     [Cirsium candidissimum]
                                                     [Cirsium pastoris]
                                               Cirsium occidentale var. compactum
                                               Cirsium occidentale var. coulteri
                                                     [Cirsium coulteri]
                                               Cirsium occidentale var. occidentale
                                                     [Cirsium coulteri]
                                               Cirsium occidentale var. venustum
                                                     [Cirsium proteanum]
                                             Cirsium ochrocentrum
                                                   [Cnicus ochrocentrus]
                                               Cirsium ochrocentrum subsp. ochrocentrum
                                                     [Cnicus ochrocentrus]
                                               Cirsium ochrocentrum var. martinii
                                                     [Cirsium ochrocentrum subsp. martinii]
                                             Cirsium ownbeyi
                                             Cirsium palustre
                                                   [Carduus altissimus]
                                             Cirsium parryi
                                                   [Cirsium gilense]
                                                   [Cirsium inornatum]
                                                   [Cirsium pallidum]
                                                   [Cirsium parryi subsp. mogollonicum]
                                                   [Cnicus parryi]
                                               Cirsium parryi subsp. parryi
                                                     [Cnicus parryi]
                                             Cirsium perplexans
                                                   [Cirsium vernale]
                                             Cirsium pitcheri
                                             Cirsium praeteriens
                                             Cirsium pugnax
                                             Cirsium pulcherrimum
                                               Cirsium pulcherrimum var. aridum
                                                     [Cirsium aridum]
                                             Cirsium pumilum
                                                   [Cirsium odoratum]
                                               Cirsium pumilum var. hillii
                                                     [Cirsium hillii]
                                                     [Cirsium pumilum subsp. hillii]
                                             Cirsium pyrenaicum
                                             Cirsium quercetorum
                                                   [Cirsium quercetorum var. mendocinum]
                                                   [Cirsium quercetorum var. walkerianum]
                                                   [Cirsium quercetorum var. xerolepis]
                                                   [Cirsium walkerianum]
                                               Cirsium quercetorum var. quercetorum
                                             Cirsium remotifolium
                                                   [Cirsium acanthodontum]
                                                   [Cirsium amblylepis]
                                                   [Cirsium callilepis var. oregonense]
                                                   [Cirsium callilepis var. pseudocarlinoides]
                                                   [Cirsium mendocinum]
                                                   [Cirsium oreganum]
                                                   [Cirsium remotifolium subsp. oregonense]
                                                   [Cirsium remotifolium subsp. pseudocarlinoides]
                                                   [Cirsium stenolepidum]
                                               Cirsium remotifolium subsp. remotifolium
                                               Cirsium remotifolium var. odontolepis
                                                     [Cirsium amblylepis]
                                                     [Cirsium callilepis var. oregonense]
                                                     [Cirsium callilepis var. pseudocarlinoides]
                                                     [Cirsium remotifolium subsp. oregonense]
                                                     [Cirsium remotifolium subsp. pseudocarlinoides]
                                               Cirsium remotifolium var. rivulare
                                                     [Cirsium acanthodontum]
                                                     [Cirsium oreganum]
                                             Cirsium repandum
                                                   [Carduus repandus]
                                             Cirsium rhothophilum
                                             Cirsium rydbergii
                                                   [Cirsium lactucinum]
                                             Cirsium scabrum
                                             Cirsium scariosum
                                                   [Carduus americanus]
                                                   [Carduus coloradensis]
                                                   [Cirsium acaule var. americanum]
                                                   [Cirsium acaulescens]
                                                   [Cirsium americanum]
                                                   [Cirsium butleri]
                                                   [Cirsium coloradense subsp. acaulescens]
                                                   [Cirsium coloradense subsp. longissimum]
                                                   [Cirsium coloradense]
                                                   [Cirsium congdonii]
                                                   [Cirsium drummondii subsp. lanatum]
                                                   [Cirsium drummondii subsp. latisquamum]
                                                   [Cirsium drummondii subsp. vexans]
                                                   [Cirsium drummondii var. acaulescens]
                                                   [Cirsium drummondii var. oregonense]
                                                   [Cirsium erosum]
                                                   [Cirsium foliosum var. minganense]
                                                   [Cirsium kelseyi]
                                                   [Cirsium lacerum]
                                                   [Cirsium magnificum]
                                                   [Cirsium minganense]
                                                   [Cirsium oreophilum]
                                                   [Cirsium quercetorum var. citrinum]
                                                   [Cirsium tioganum var. coloradense]
                                                   [Cirsium tioganum var. tioganum]
                                                   [Cirsium tioganum]
                                                   [Cnicus drummondii var. acaulescens]
                                                   [Cnicus tioganus]
                                               Cirsium scariosum var. americanum
                                                     [Carduus americanus]
                                                     [Cirsium acaule var. americanum]
                                                     [Cirsium acaulescens]
                                                     [Cirsium americanum]
                                                     [Cirsium coloradense subsp. acaulescens]
                                                     [Cirsium coloradense subsp. longissimum]
                                                     [Cirsium drummondii subsp. lanatum]
                                                     [Cirsium drummondii subsp. vexans]
                                                     [Cirsium drummondii var. acaulescens]
                                                     [Cirsium drummondii var. oregonense]
                                                     [Cirsium tioganum var. tioganum]
                                                     [Cirsium tioganum]
                                                     [Cnicus drummondii var. acaulescens]
                                                     [Cnicus tioganus]
                                               Cirsium scariosum var. citrinum
                                                     [Cirsium drummondii subsp. latisquamum]
                                                     [Cirsium quercetorum var. citrinum]
                                               Cirsium scariosum var. coloradense
                                                     [Carduus coloradensis]
                                                     [Cirsium coloradense]
                                                     [Cirsium erosum]
                                                     [Cirsium tioganum var. coloradense]
                                               Cirsium scariosum var. congdonii
                                                     [Cirsium congdonii]
                                               Cirsium scariosum var. loncholepis
                                                     [Cirsium loncholepis]
                                               Cirsium scariosum var. scariosum
                                               Cirsium scariosum var. thorneae
                                             Cirsium spinosissimum
                                                   [Carduus spinosissimus]
                                             Cirsium subniveum
                                                   [Carduus nevadensis]
                                                   [Cirsium davisii]
                                                   [Cirsium humboldtense]
                                             Cirsium texanum
                                                   [Carduus austrinus]
                                                   [Carduus helleri]
                                                   [Cirsium helleri]
                                                   [Cirsium ochrocentrum var. helleri]
                                                   [Cirsium texanum var. stenolepis]
                                             Cirsium tracyi
                                                   [Carduus tracyi]
                                                   [Cirsium floccosum]
                                                   [Cirsium undulatum var. tracyi]
                                             Cirsium turneri
                                             Cirsium undulatum
                                                   [Carduus undulatus]
                                                   [Cirsium megacephalum]
                                                   [Cirsium undulatum var. megacephalum]
                                                   [Cnicus undulatus var. megacephalus]
                                                   [Cnicus undulatus]
                                               Cirsium undulatum var. undulatum
                                                     [Carduus helleri]
                                                     [Carduus undulatus]
                                                     [Cirsium helleri]
                                                     [Cirsium megacephalum]
                                                     [Cirsium ochrocentrum var. helleri]
                                                     [Cirsium undulatum var. megacephalum]
                                                     [Cnicus undulatus var. megacephalus]
                                             Cirsium vinaceum
                                             Cirsium virginense
                                             Cirsium virginianum
                                                   [Carduus virginianus]
                                                   [Cirsium revolutum]
                                             Cirsium vulgare
                                                   [Carduus lanceolatus]
                                                   [Carduus vulgaris]
                                                   [Cirsium lanceolatum var. hypoleucum]
                                             Cirsium wheeleri
                                                   [Cirsium blumeri]
                                                   [Cirsium olivescens]
                                                   [Cirsium perennans]
                                                   [Cnicus wheeleri]
                                             Cirsium wrightii
                                     Cladanthus
                                             Cladanthus mixtus
                                                   [Anthemis mixta]
                                                   [Chamaemelum mixtum]
                                                   [Ormenis mixta]
                                     Clappia
                                             Clappia cahabensis
                                             Clappia suaedifolia
                                     Clibadium
                                             Clibadium erosum
                                     Cnicus
                                     Columbiadoria
                                             Columbiadoria hallii
                                                   [Haplopappus hallii]
                                                   [Hesperodoria hallii]
                                     Condylidium
                                             Condylidium iresinoides
                                                   [Eupatorium iresinoides]
                                     Conoclinium
                                             Conoclinium betonicifolium
                                                   [Eupatorium betonicifolium]
                                             Conoclinium coelestinum
                                                   [Eupatorium coelestinum]
                                             Conoclinium dissectum
                                                   [Conoclinium greggii]
                                                   [Eupatorium greggii]
                                     Constancea
                                             Constancea nevinii
                                                   [Eriophyllum nevinii]
                                     Conyza
                                     Coreocarpus
                                             Coreocarpus arizonicus
                                     Coreopsis
                                             Coreopsis auriculata
                                             Coreopsis basalis
                                                   [Calliopsis basalis]
                                                   [Coreopsis basalis var. wrightii]
                                                   [Coreopsis drummondii var. wrightii]
                                                   [Coreopsis drummondii]
                                                   [Coreopsis wrightii]
                                             Coreopsis bigelowii
                                                   [Coreopsis bigelovii]
                                                   [Leptosyne bigelovii]
                                                   [Pugiopappus bigelovii]
                                             Coreopsis californica
                                                   [Coreopsis californica var. newberryi]
                                                   [Leptosyne californica]
                                               Coreopsis californica var. californica
                                                     [Leptosyne californica]
                                             Coreopsis calliopsidea
                                                   [Agarista calliopsidea]
                                             Coreopsis delphiniifolia
                                                   [Coreopsis delphiniifolia var. chlooidea]
                                                   [Coreopsis major var. linearis]
                                             Coreopsis douglasii
                                                   [Coreopsis stillmanii var. jonesii]
                                                   [Leptosyne douglasii]
                                             Coreopsis gigantea
                                                   [Leptosyne gigantea]
                                                   [Tuckermannia gigantea]
                                             Coreopsis gladiata
                                                   [Coreopsis angustifolia]
                                                   [Coreopsis falcata]
                                                   [Coreopsis floridana]
                                                   [Coreopsis gladiata var. linifolia]
                                                   [Coreopsis helianthoides]
                                                   [Coreopsis linifolia]
                                                   [Coreopsis longifolia var. godfreyi]
                                                   [Coreopsis longifolia]
                                                   [Coreopsis oniscicarpa var. simulans]
                                                   [Coreopsis oniscicarpa]
                                             Coreopsis grandiflora
                                                   [Coreopsis grandiflora var. harveyana]
                                                   [Coreopsis grandiflora var. longipes]
                                                   [Coreopsis grandiflora var. pilosa]
                                                   [Coreopsis grandiflora var. saxicola]
                                                   [Coreopsis heterolepis]
                                                   [Coreopsis longipes]
                                                   [Coreopsis saxicola var. duncanii]
                                                   [Coreopsis saxicola]
                                               Coreopsis grandiflora var. grandiflora
                                                     [Coreopsis grandiflora var. pilosa]
                                               Coreopsis grandiflora var. inclinata
                                             Coreopsis hamiltonii
                                                   [Leptosyne hamiltonii]
                                             Coreopsis integrifolia
                                             Coreopsis intermedia
                                             Coreopsis lanceolata
                                                   [Coreopsis crassifolia]
                                                   [Coreopsis heterogyna]
                                                   [Coreopsis lanceolata var. villosa]
                                             Coreopsis latifolia
                                                   [Leiodon latifolius]
                                             Coreopsis leavenworthii
                                                   [Coreopsis angustata]
                                                   [Coreopsis leavenworthii var. curtissii]
                                                   [Coreopsis leavenworthii var. garberi]
                                                   [Coreopsis leavenworthii var. lewtonii]
                                                   [Coreopsis lewtonii]
                                             Coreopsis major
                                                   [Coreopsis major var. oemleri]
                                                   [Coreopsis major var. rigida]
                                                   [Coreopsis major var. stellata]
                                             Coreopsis maritima
                                                   [Tuckermannia maritima]
                                             Coreopsis nudata
                                             Coreopsis nuecensis
                                                   [Coreopsis nuecensoides]
                                             Coreopsis palmata
                                             Coreopsis palustris
                                             Coreopsis pubescens
                                                   [Coreopsis corninsularis]
                                                   [Coreopsis debilis]
                                                   [Coreopsis pubescens var. debilis]
                                                   [Coreopsis pubescens var. robusta]
                                               Coreopsis pubescens var. pubescens
                                             Coreopsis pulchra
                                             Coreopsis rosea
                                             Coreopsis stillmanii
                                                   [Leptosyne stillmanii]
                                             Coreopsis tinctoria
                                                   [Coreopsis atkinsoniana]
                                                   [Coreopsis cardaminefolia]
                                                   [Coreopsis similis]
                                                   [Coreopsis stenophylla]
                                                   [Coreopsis tinctoria var. atkinsoniana]
                                                   [Coreopsis tinctoria var. similis]
                                               Coreopsis tinctoria var. tinctoria
                                                     [Coreopsis cardaminefolia]
                                                     [Coreopsis stenophylla]
                                                     [Coreopsis tinctoria var. imminuta]
                                             Coreopsis tripteris
                                                   [Coreopsis tripteris var. deamii]
                                                   [Coreopsis tripteris var. intercedens]
                                                   [Coreopsis tripteris var. smithii]
                                                   [Coreopsis tripteris var. subrhomboidea]
                                             Coreopsis verticillata
                                     Corethrogyne
                                             Corethrogyne filaginifolia
                                                   [Aster tomentellus]
                                                   [Corethrogyne californica var. californica]
                                                   [Corethrogyne californica var. lyonii]
                                                   [Corethrogyne californica var. obovata]
                                                   [Corethrogyne californica]
                                                   [Corethrogyne filaginifolia var. bernardina]
                                                   [Corethrogyne filaginifolia var. brevicula]
                                                   [Corethrogyne filaginifolia var. californica]
                                                   [Corethrogyne filaginifolia var. glomerata]
                                                   [Corethrogyne filaginifolia var. hamiltonensis]
                                                   [Corethrogyne filaginifolia var. incana]
                                                   [Corethrogyne filaginifolia var. latifolia]
                                                   [Corethrogyne filaginifolia var. linifolia]
                                                   [Corethrogyne filaginifolia var. peirsonii]
                                                   [Corethrogyne filaginifolia var. pinetorum]
                                                   [Corethrogyne filaginifolia var. rigida]
                                                   [Corethrogyne filaginifolia var. robusta]
                                                   [Corethrogyne filaginifolia var. sessilis]
                                                   [Corethrogyne filaginifolia var. virgata]
                                                   [Corethrogyne filaginifolia var. viscidula]
                                                   [Corethrogyne flagellaris]
                                                   [Corethrogyne floccosa]
                                                   [Corethrogyne incana]
                                                   [Corethrogyne leucophylla]
                                                   [Corethrogyne linifolia]
                                                   [Corethrogyne obovata]
                                                   [Corethrogyne scabra]
                                                   [Corethrogyne sessilis]
                                                   [Corethrogyne tomentella]
                                                   [Corethrogyne viscidula]
                                                   [Lessingia filaginifolia var. californica]
                                                   [Lessingia filaginifolia]
                                               Corethrogyne filaginifolia var. filaginifolia
                                                     [Corethrogyne filaginifolia var. bernardina]
                                                     [Corethrogyne filaginifolia var. brevicula]
                                                     [Corethrogyne filaginifolia var. glomerata]
                                                     [Corethrogyne filaginifolia var. hamiltonensis]
                                                     [Corethrogyne filaginifolia var. incana]
                                                     [Corethrogyne filaginifolia var. latifolia]
                                                     [Corethrogyne filaginifolia var. linifolia]
                                                     [Corethrogyne filaginifolia var. peirsonii]
                                                     [Corethrogyne filaginifolia var. pinetorum]
                                                     [Corethrogyne filaginifolia var. rigida]
                                                     [Corethrogyne filaginifolia var. robusta]
                                                     [Corethrogyne filaginifolia var. sessilis]
                                                     [Corethrogyne filaginifolia var. virgata]
                                                     [Corethrogyne filaginifolia var. viscidula]
                                                     [Corethrogyne flagellaris]
                                                     [Corethrogyne floccosa]
                                                     [Corethrogyne incana]
                                                     [Corethrogyne leucophylla]
                                                     [Corethrogyne linifolia]
                                                     [Corethrogyne scabra]
                                                     [Corethrogyne sessilis]
                                                     [Corethrogyne tomentella]
                                                     [Corethrogyne viscidula]
                                                     [Lessingia filaginifolia]
                                     Cosmos
                                             Cosmos bipinnatus
                                             Cosmos caudatus
                                                   [Bidens caudatus]
                                             Cosmos parviflorus
                                                   [Coreopsis parviflora]
                                             Cosmos sulphureus
                                     Cota
                                             Cota altissima
                                             Cota austriaca
                                                   [Anthemis austriaca]
                                             Cota tinctoria
                                               Cota tinctoria subsp. tinctoria
                                                     [Anthemis tinctoria]
                                     Cotula
                                             Cotula australis
                                             Cotula coronopifolia
                                             Cotula mexicana
                                     Crassocephalum
                                             Crassocephalum crepidioides
                                             Crassocephalum rubens
                                                   [Senecio cernuus]
                                     Crepidiastrum
                                             Crepidiastrum denticulato-platyphyllum
                                     Crepis
                                             Crepis acuminata
                                                   [Crepis acuminata subsp. pluriflora]
                                                   [Psilochenia acuminata subsp. pluriflora]
                                                   [Psilochenia acuminata]
                                               Crepis acuminata subsp. acuminata
                                                     [Crepis acuminata subsp. typica]
                                                     [Psilochenia acuminata]
                                             Crepis atribarba
                                                   [Crepis atribarba var. cytotaxonomicorum]
                                                   [Psilochenia atribarba]
                                               Crepis atribarba subsp. atribarba
                                                     [Crepis atribarba subsp. cytotaxonomicorum]
                                                     [Crepis atribarba subsp. typicus]
                                                     [Crepis atribarba var. cytotaxonomicorum]
                                                     [Psilochenia atribarba]
                                             Crepis bakeri
                                               Crepis bakeri subsp. bakeri
                                                     [Psilochenia bakeri]
                                               Crepis bakeri subsp. cusickii
                                                     [Psilochenia bakeri subsp. cusickii]
                                               Crepis bakeri subsp. idahoensis
                                                     [Psilochenia bakeri subsp. idahoensis]
                                             Crepis barbigera
                                                   [Crepis atribarba subsp. originalis]
                                             Crepis biennis
                                             Crepis bursifolia
                                             Crepis capillaris
                                             Crepis foetida
                                               Crepis foetida var. foetida
                                               Crepis foetida var. rhoeadifolia
                                             Crepis intermedia
                                                   [Psilochenia intermedia]
                                             Crepis modocensis
                                               Crepis modocensis subsp. glareosa
                                                     [Psilochenia modocensis subsp. glareosa]
                                               Crepis modocensis subsp. modocensis
                                                     [Crepis modocensis subsp. typica]
                                                     [Psilochenia modocensis]
                                               Crepis modocensis subsp. rostrata
                                                     [Crepis modocensis var. rostrata]
                                                     [Psilochenia modocensis subsp. rostrata]
                                               Crepis modocensis subsp. subacaulis
                                                     [Psilochenia modocensis subsp. subacaulis]
                                             Crepis monticola
                                                   [Psilochenia monticola]
                                             Crepis nicaeensis
                                             Crepis occidentalis
                                               Crepis occidentalis subsp. conjuncta
                                                     [Psilochenia occidentalis subsp. conjuncta]
                                               Crepis occidentalis subsp. costata
                                                     [Crepis occidentalis var. costata]
                                                     [Psilochenia occidentalis subsp. costata]
                                               Crepis occidentalis subsp. occidentalis
                                                     [Crepis occidentalis subsp. typica]
                                                     [Psilochenia occidentalis]
                                               Crepis occidentalis subsp. pumila
                                                     [Crepis occidentalis var. pumila]
                                               Crepis occidentalis var. nevadensis
                                             Crepis pannonica
                                                   [Crepis rigida]
                                               Crepis pannonica subsp. pannonica
                                                     [Crepis rigida]
                                             Crepis pleurocarpa
                                                   [Psilochenia pleurocarpa]
                                             Crepis pulchra
                                             Crepis rubra
                                             Crepis runcinata
                                               Crepis runcinata subsp. andersonii
                                                     [Crepis runcinata var. andersonii]
                                                     [Psilochenia runcinata subsp. andersonii]
                                               Crepis runcinata subsp. barberi
                                                     [Crepis barberi]
                                                     [Crepis glauca subsp. barberi]
                                                     [Crepis runcinata var. barberi]
                                                     [Psilochenia runcinata subsp. barberi]
                                               Crepis runcinata subsp. glauca
                                                     [Crepis glauca]
                                                     [Psilochenia runcinata subsp. glauca]
                                               Crepis runcinata subsp. hallii
                                                     [Psilochenia runcinata subsp. hallii]
                                               Crepis runcinata subsp. hispidulosa
                                                     [Crepis platyphylla]
                                                     [Crepis riparia]
                                                     [Crepis runcinata var. hispidulosa]
                                                     [Psilochenia runcinata subsp. hispidulosa]
                                               Crepis runcinata subsp. imbricata
                                                     [Crepis runcinata var. imbricata]
                                                     [Psilochenia runcinata subsp. imbricata]
                                               Crepis runcinata subsp. runcinata
                                                     [Crepis alpicola]
                                                     [Crepis glaucella]
                                                     [Crepis neomexicana]
                                                     [Crepis perplexans]
                                                     [Crepis runcinata subsp. typica]
                                                     [Psilochenia runcinata]
                                               Crepis runcinata var. glauca
                                             Crepis setosa
                                             Crepis tectorum
                                             Crepis vesicaria
                                             Crepis zacintha
                                     Cristatella
                                             Cristatella mucedo
                                     Critonia
                                             Critonia critoniformis
                                             Critonia portoricensis
                                                   [Eupatorium portoricense]
                                             Critonia quadrangularis
                                                   [Eupatorium pycnocephalum]
                                     Crocidium
                                             Crocidium multicaule
                                     Crockeria
                                     Croptilon
                                             Croptilon divaricatum
                                                   [Haplopappus divaricatus]
                                                   [Heterotheca lamarckii]
                                                   [Inula divaricata]
                                                   [Isopappus divaricatus]
                                             Croptilon hookerianum
                                                   [Croptilon divaricatum var. hookerianum]
                                                   [Haplopappus divaricatus var. hookerianus]
                                                   [Haplopappus validus subsp. torreyi]
                                                   [Isopappus hookerianus]
                                               Croptilon hookerianum var. graniticum
                                                     [Croptilon divaricatum var. graniticum]
                                                     [Haplopappus validus subsp. graniticus]
                                               Croptilon hookerianum var. hookerianum
                                                     [Croptilon divaricatum var. hookerianum]
                                                     [Haplopappus divaricatus var. hookerianus]
                                                     [Haplopappus validus subsp. torreyi]
                                                     [Isopappus hookerianus]
                                               Croptilon hookerianum var. validum
                                                     [Haplopappus validus]
                                                     [Isopappus validus]
                                             Croptilon rigidifolium
                                                   [Croptilon divaricatum var. hirtellum]
                                                   [Haplopappus rigidifolius]
                                     Crupina
                                             Crupina vulgaris
                                               Crupina vulgaris var. brachypappa
                                               Crupina vulgaris var. vulgaris
                                     Cuniculotinus
                                             Cuniculotinus gramineus
                                                   [Chrysothamnus gramineus]
                                                   [Ericameria graminea]
                                                   [Petradoria discoidea]
                                     Cyanopsis
                                     Cyanthillium
                                             Cyanthillium cinereum
                                                   [Cacalia rotundifolia]
                                                   [Conyza cinerea]
                                                   [Senecioides cinerea]
                                                   [Vernonia cinerea var. parviflora]
                                                   [Vernonia cinerea]
                                               Cyanthillium cinereum var. parviflorum
                                                     [Vernonia cinerea var. parviflora]
                                     Cyclachaena
                                             Cyclachaena xanthiifolia
                                                   [Cyclachaena xanthifolia]
                                                   [Iva xanthifolia]
                                     Cymophora
                                             Cymophora accedens
                                                   [Tridax accedens]
                                     Cynara
                                             Cynara cardunculus
                                             Cynara scolymus
                                     Cynoctonum
                                     Cynodendron
                                     Dahlia
                                             Dahlia pinnata
                                                   [Dahlia rosea]
                                     Deinandra
                                             Deinandra arida
                                                   [Hemizonia arida]
                                             Deinandra bacigalupii
                                             Deinandra clementina
                                                   [Hemizonia clementina]
                                             Deinandra conjugens
                                                   [Hemizonia conjugens]
                                             Deinandra corymbosa
                                                   [Deinandra corymbosa subsp. macrocephala]
                                                   [Hemizonia corymbosa subsp. corymbosa]
                                                   [Hemizonia corymbosa subsp. macrocephala]
                                                   [Hemizonia corymbosa]
                                               Deinandra corymbosa subsp. corymbosa
                                                     [Hemizonia corymbosa subsp. corymbosa]
                                                     [Hemizonia corymbosa]
                                             Deinandra fasciculata
                                                   [Hemizonia fasciculata]
                                                   [Hemizonia ramosissima]
                                             Deinandra floribunda
                                                   [Hemizonia floribunda]
                                             Deinandra halliana
                                                   [Hemizonia halliana]
                                             Deinandra increscens
                                               Deinandra increscens subsp. increscens
                                                     [Hemizonia increscens subsp. increscens]
                                                     [Hemizonia increscens]
                                                     [Hemizonia paniculata subsp. increscens]
                                               Deinandra increscens subsp. villosa
                                                     [Hemizonia increscens subsp. villosa]
                                             Deinandra kelloggii
                                                   [Hemizonia kelloggii]
                                             Deinandra lobbii
                                                   [Hemizonia lobbii]
                                             Deinandra minthornii
                                                   [Hemizonia minthornii]
                                             Deinandra mohavensis
                                                   [Hemizonia mohavensis]
                                             Deinandra pallida
                                                   [Hemizonia pallida]
                                             Deinandra paniculata
                                                   [Deinandra increscens subsp. foliosa]
                                                   [Hemizonia increscens subsp. foliosa]
                                                   [Hemizonia paniculata]
                                             Deinandra pentactis
                                                   [Hemizonia pentactis]
                                     Delairea
                                             Delairea odorata
                                                   [Senecio mikanioides]
                                     Delwiensia
                                             Delwiensia pattersonii
                                                   [Artemisia pattersonii]
                                     Diaperia
                                             Diaperia candida
                                                   [Calymmandra candida]
                                                   [Evax candida]
                                                   [Filago candida]
                                             Diaperia prolifera
                                                   [Evax prolifera]
                                                   [Filago nuttallii]
                                             Diaperia verna
                                                   [Diaperia multicaulis]
                                                   [Evax multicaulis]
                                                   [Evax verna var. verna]
                                                   [Evax verna]
                                                   [Filaginopsis multicaulis]
                                                   [Filago verna]
                                               Diaperia verna var. drummondii
                                                     [Diaperia drummondii]
                                                     [Evax multicaulis var. drummondii]
                                                     [Evax verna var. drummondii]
                                                     [Filaginopsis drummondii]
                                     Dichaetophora
                                             Dichaetophora campestris
                                     Dicoria
                                             Dicoria canescens
                                               Dicoria canescens subsp. brandegeei
                                                     [Dicoria brandegeei]
                                                     [Dicoria canescens var. brandegeei]
                                                     [Dicoria paniculata]
                                               Dicoria canescens subsp. canescens
                                                     [Dicoria oblongifolia]
                                               Dicoria canescens subsp. clarkiae
                                                     [Dicoria clarkiae]
                                               Dicoria canescens subsp. hispidula
                                                     [Dicoria canescens var. hispidula]
                                               Dicoria canescens subsp. wetherillii
                                                     [Dicoria canescens var. wetherillii]
                                                     [Dicoria wetherillii]
                                     Dicranocarpus
                                             Dicranocarpus parviflorus
                                     Dieteria
                                             Dieteria asteroides
                                                   [Aster tephrodes]
                                                   [Machaeranthera asteroides var. asteroides]
                                                   [Machaeranthera asteroides]
                                                   [Machaeranthera tephrodes]
                                               Dieteria asteroides var. asteroides
                                               Dieteria asteroides var. glandulosa
                                                     [Machaeranthera asteroides var. glandulosa]
                                               Dieteria asteroides var. lagunensis
                                                     [Machaeranthera asteroides var. lagunensis]
                                                     [Machaeranthera lagunensis]
                                             Dieteria bigelovii
                                                   [Aster bigelovii]
                                                   [Aster pattersonii]
                                                   [Machaeranthera bigelovii var. bigelovii]
                                                   [Machaeranthera bigelovii]
                                                   [Machaeranthera centaureoides]
                                                   [Machaeranthera pattersonii]
                                               Dieteria bigelovii var. commixta
                                                     [Machaeranthera bigelovii var. commixta]
                                                     [Machaeranthera canescens var. commixta]
                                                     [Machaeranthera commixta]
                                                     [Machaeranthera superba]
                                               Dieteria bigelovii var. mucronata
                                                     [Aster adenolepis]
                                                     [Machaeranthera bigelovii var. mucronata]
                                                     [Machaeranthera mucronata]
                                             Dieteria canescens
                                                   [Aster canescens var. viscosus]
                                                   [Aster canescens]
                                                   [Aster inornatus]
                                                   [Dieteria divaricata]
                                                   [Dieteria pulverulenta]
                                                   [Dieteria viscosa]
                                                   [Machaeranthera attenuata]
                                                   [Machaeranthera canescens subsp. canescens]
                                                   [Machaeranthera canescens var. canescens]
                                                   [Machaeranthera canescens var. latifolia]
                                                   [Machaeranthera canescens var. monticola]
                                                   [Machaeranthera canescens var. vacans]
                                                   [Machaeranthera canescens]
                                                   [Machaeranthera divaricata]
                                                   [Machaeranthera inornata]
                                                   [Machaeranthera laetevirens]
                                                   [Machaeranthera latifolia]
                                                   [Machaeranthera linearis linearis]
                                                   [Machaeranthera linearis]
                                                   [Machaeranthera pinosa]
                                                   [Machaeranthera pulverulenta var. vacans]
                                                   [Machaeranthera pulverulenta]
                                                   [Machaeranthera spinulosa]
                                                   [Machaeranthera viscosa]
                                               Dieteria canescens var. ambigua
                                                     [Machaeranthera canescens var. ambigua]
                                               Dieteria canescens var. aristata
                                                     [Aster canescens var. aristatus]
                                                     [Machaeranthera canescens var. aristata]
                                                     [Machaeranthera rigida]
                                               Dieteria canescens var. glabra
                                                     [Aster cichoriaceus]
                                                     [Aster linearis]
                                                     [Machaeranthera canescens subsp. glabra]
                                                     [Machaeranthera canescens var. glabra]
                                                     [Machaeranthera cichoriacea]
                                               Dieteria canescens var. incana
                                                     [Dieteria incana]
                                                     [Diplopappus incanus]
                                                     [Machaeranthera canescens var. incana]
                                                     [Machaeranthera incana]
                                               Dieteria canescens var. leucanthemifolia
                                                     [Aster leucanthemifolius]
                                                     [Machaeranthera canescens var. leucanthemifolia]
                                                     [Machaeranthera leucanthemifolia]
                                               Dieteria canescens var. nebraskana
                                                     [Machaeranthera canescens var. nebraskana]
                                               Dieteria canescens var. sessiliflora
                                                     [Dieteria sessiliflora]
                                                     [Machaeranthera canescens var. sessiliflora]
                                                     [Machaeranthera sessiliflora]
                                               Dieteria canescens var. ziegleri
                                                     [Machaeranthera canescens subsp. ziegleri]
                                                     [Machaeranthera canescens var. ziegleri]
                                             Dieteria shastensis
                                                   [Aster shastensis var. eradiatus]
                                                   [Aster shastensis var. glossophyllus]
                                                   [Aster shastensis var. latifolius]
                                                   [Aster shastensis]
                                                   [Machaeranthera canescens var. shastensis]
                                                   [Machaeranthera eradiata]
                                                   [Machaeranthera montana]
                                                   [Machaeranthera shastensis var. glossophylla]
                                                   [Machaeranthera shastensis var. latifolia]
                                                   [Machaeranthera shastensis var. montana]
                                                   [Machaeranthera shastensis]
                                     Dimeresia
                                             Dimeresia howellii
                                     Dimorphotheca
                                             Dimorphotheca sinuata
                                             Dimorphotheca tragus
                                                   [Castalis tragus]
                                                   [Dimorphotheca aurantiaca]
                                     Dittrichia
                                             Dittrichia graveolens
                                                   [Inula graveolens]
                                             Dittrichia viscosa
                                                   [Cupularia viscosa]
                                                   [Inula viscosa]
                                               Dittrichia viscosa subsp. viscosa
                                                     [Conyza viscosa]
                                                     [Cupularia viscosa]
                                                     [Inula viscosa]
                                     Doellingeria
                                             Doellingeria infirma
                                                   [Aster humilis]
                                                   [Aster infirmus]
                                                   [Aster umbellatus var. brevisquamis]
                                                   [Doellingeria humilis]
                                             Doellingeria sericocarpoides
                                                   [Aster sericocarpoides]
                                                   [Aster umbellatus var. latifolius]
                                                   [Doellingeria umbellata var. latifolia]
                                             Doellingeria umbellata
                                                   [Aster umbellatus]
                                               Doellingeria umbellata var. pubens
                                                     [Aster pubentior]
                                                     [Aster umbellatus var. pubens]
                                                     [Doellingeria umbellata subsp. pubens]
                                               Doellingeria umbellata var. umbellata
                                                     [Aster umbellatus]
                                     Dolicholus
                                     Doronicum
                                             Doronicum pardalianches
                                             Doronicum plantagineum
                                     Dracopis
                                     Dubautia
                                             Dubautia arborea
                                                   [Railliardia arborea]
                                             Dubautia ciliolata
                                               Dubautia ciliolata subsp. ciliolata
                                                     [Dubautia ciliolata var. juniperoides]
                                                     [Dubautia ciliolata var. trinervia]
                                                     [Railliardia ciliolata var. juniperoides]
                                                     [Railliardia ciliolata var. trinervia]
                                                     [Railliardia ciliolata]
                                               Dubautia ciliolata subsp. glutinosa
                                             Dubautia demissifolia
                                                   [Dubautia montana var. robustior]
                                                   [Railliardia demissifolia]
                                                   [Railliardia montana var. robustior]
                                             Dubautia dolosa
                                                   [Dubautia waianapanapaenis]
                                                   [Railliardia dolosa]
                                                   [Railliardia waianapanapaenis]
                                             Dubautia fallax
                                                   [Dubautia fucosa]
                                                   [Dubautia kohalae]
                                                   [Dubautia lonchophylla]
                                                   [Railliardia kohalae]
                                                   [Railliautia fallax]
                                                   [Railliautia fucosa]
                                             Dubautia herbstobatae
                                                   [Railliardia herbstobatae]
                                             Dubautia imbricata
                                               Dubautia imbricata subsp. acronaea
                                               Dubautia imbricata subsp. imbricata
                                             Dubautia kenwoodii
                                             Dubautia knudsenii
                                               Dubautia knudsenii subsp. filiformis
                                               Dubautia knudsenii subsp. knudsenii
                                               Dubautia knudsenii subsp. nagatae
                                                     [Dubautia nagatae]
                                             Dubautia laevigata
                                                   [Dubautia laevigata var. parvifolia]
                                             Dubautia latifolia
                                                   [Railliardia latifolia var. helleri]
                                                   [Railliardia latifolia]
                                             Dubautia laxa
                                               Dubautia laxa subsp. bryanii
                                                     [Dubautia laxa var. bryanii]
                                               Dubautia laxa subsp. hirsuta
                                                     [Dubautia laxa var. hirsuta]
                                                     [Dubautia laxa var. intercedens]
                                                     [Dubautia laxa var. pedicellata]
                                                     [Dubautia laxa var. skottsbergii]
                                                     [Dubautia laxa var. waianensis]
                                               Dubautia laxa subsp. laxa
                                                     [Dubautia knudsenii var. degeneri]
                                                     [Dubautia laxa var. greenwelliae]
                                                     [Dubautia laxa var. hispida]
                                                     [Dubautia laxa var. obovata]
                                               Dubautia laxa subsp. pseudoplantaginea
                                                     [Dubautia laxa var. pseudoplantaginea]
                                             Dubautia linearis
                                               Dubautia linearis subsp. hillebrandii
                                                     [Dubautia hillebrandii]
                                                     [Railliardia ciliolata var. leptocephala]
                                                     [Railliardia hillebrandii]
                                                     [Railliardia vafra]
                                               Dubautia linearis subsp. linearis
                                                     [Railliardia linearis]
                                               Dubautia linearis subsp. opposita
                                                     [Dubautia linearis var. opposita]
                                                     [Railliardia linearis var. opposita]
                                             Dubautia media
                                                   [Dubautia mendacoides]
                                                   [Dubautia mendax]
                                             Dubautia menziesii
                                                   [Dubautia ciliolata var. trinervia]
                                                   [Dubautia menziesii var. angustifolia]
                                                   [Dubautia rockii]
                                                   [Dubautia struthioloides]
                                                   [Railliardia ciliolata var. trinervia]
                                                   [Railliardia menziesii var. angustifolia]
                                                   [Railliardia menziesii]
                                                   [Railliardia rockii]
                                                   [Railliardia struthioloides]
                                             Dubautia microcephala
                                             Dubautia paleata
                                                   [Dubautia paludicola]
                                             Dubautia pauciflorula
                                             Dubautia plantaginea
                                               Dubautia plantaginea subsp. humilis
                                               Dubautia plantaginea subsp. magnifolia
                                                     [Dubautia magnifolia]
                                               Dubautia plantaginea subsp. plantaginea
                                                     [Dubautia magnifolia]
                                                     [Dubautia plantaginea var. acridentata]
                                                     [Dubautia plantaginea var. glandulosa]
                                                     [Dubautia plantaginea var. pauoaensis]
                                                     [Dubautia plantaginea var. platyphylla]
                                                     [Dubautia plantaginea var. strigosa]
                                             Dubautia platyphylla
                                                   [Dubautia platyphylla var. leptophylla]
                                                   [Railliardia platyphylla var. leptophylla]
                                                   [Railliardia platyphylla var. trillioidea]
                                                   [Railliardia platyphylla]
                                             Dubautia raillardioides
                                             Dubautia reticulata
                                                   [Dubautia montana var. longifolia]
                                                   [Dubautia montana]
                                                   [Railliardia montana var. longifolia]
                                                   [Railliardia montana]
                                                   [Railliardia reticulata]
                                             Dubautia scabra
                                               Dubautia scabra subsp. leiophylla
                                                     [Dubautia lonchophylla]
                                                     [Dubautia molokaiensis var. stipitata]
                                                     [Dubautia molokaiensis]
                                                     [Dubautia scabra var. leiophylla]
                                                     [Dubautia scabra var. munroi]
                                                     [Railliardia lonchophylla var. stipitata]
                                                     [Railliardia lonchophylla]
                                                     [Railliardia molokaiensis var. stipitata]
                                                     [Railliardia scabra var. leiophylla]
                                                     [Railliardia scabra var. munroi]
                                               Dubautia scabra subsp. scabra
                                                     [Railliardia scabra]
                                             Dubautia sherffiana
                                                   [Dubautia sherffiana var. paucinervia]
                                                   [Railliardia sherffiana var. paucinervia]
                                                   [Railliardia sherffiana]
                                             Dubautia syndetica
                                             Dubautia thyrsiflora
                                                   [Dubautia coriacea]
                                                   [Dubautia ternifolia]
                                                   [Dubautia thyrsiflora var. cernua]
                                                   [Railliardia demissifolia var. dolichophylla]
                                                   [Railliardia ternifolia]
                                                   [Railliardia thyrsiflora var. cernua]
                                                   [Railliardia thyrsiflora]
                                             Dubautia waialealae
                                     Duchartrea
                                     Dysodiopsis
                                             Dysodiopsis tagetoides
                                                   [Dyssodia tagetoides]
                                                   [Hymenatherum tagetoides]
                                     Dysodium
                                     Dyssodia
                                             Dyssodia papposa
                                                   [Boebera papposa]
                                                   [Tagetes papposa]
                                             Dyssodia porophylla
                                     Eastwoodia
                                             Eastwoodia elegans
                                     Eatonella
                                             Eatonella nivea
                                     Echinacea
                                             Echinacea angustifolia
                                                   [Brauneria angustifolia]
                                                   [Echinacea angustifolia var. strigosa]
                                                   [Echinacea pallida var. angustifolia]
                                               Echinacea angustifolia var. angustifolia
                                                     [Brauneria angustifolia]
                                                     [Echinacea pallida var. angustifolia]
                                             Echinacea atrorubens
                                             Echinacea laevigata
                                                   [Echinacea purpurea var. laevigata]
                                             Echinacea pallida
                                                   [Brauneria pallida]
                                                   [Rudbeckia pallida]
                                             Echinacea paradoxa
                                                   [Echinacea atrorubens var. paradoxa]
                                               Echinacea paradoxa var. neglecta
                                               Echinacea paradoxa var. paradoxa
                                                     [Echinacea atrorubens var. paradoxa]
                                             Echinacea purpurea
                                                   [Brauneria purpurea]
                                                   [Echinacea purpurea var. arkansana]
                                                   [Rudbeckia purpurea]
                                             Echinacea sanguinea
                                                   [Echinacea pallida var. sanguinea]
                                             Echinacea simulata
                                             Echinacea tennesseensis
                                                   [Echinacea angustifolia var. tennesseensis]
                                     Echinops
                                             Echinops davuricus
                                                   [Echinops ruthenicus]
                                             Echinops exaltatus
                                                   [Echinops commutatus]
                                             Echinops ritro
                                               Echinops ritro subsp. ruthenicus
                                                     [Echinops ruthenicus]
                                             Echinops sphaerocephalus
                                     Eclipta
                                             Eclipta alba
                                                   [Eclipta erecta]
                                                   [Eclipta prostrata]
                                                   [Verbesina alba]
                                                   [Verbesina prostrata]
                                     Ectosperma
                                     Eddya
                                     Eggersia
                                     Egletes
                                             Egletes viscosa
                                                   [Cotula viscosa]
                                     Elephantopus
                                             Elephantopus carolinianus
                                                   [Elephantopus flexuosus]
                                                   [Elephantopus violaceus]
                                             Elephantopus elatus
                                                   [Elephantopus elatus var. intermedius]
                                             Elephantopus mollis
                                                   [Elephantopus hypomalacus]
                                                   [Elephantopus martii]
                                                   [Elephantopus pilosus]
                                             Elephantopus nudatus
                                             Elephantopus nudicaulis
                                             Elephantopus tomentosus
                                                   [Elephantopus carolinianus var. simplex]
                                     Eleutheranthera
                                             Eleutheranthera ruderalis
                                                   [Melampodium ruderale]
                                     Emilia
                                             Emilia fosbergii
                                                   [Cacalia coccinea]
                                                   [Emilia coccinea]
                                             Emilia javanica
                                                   [Emilia sonchifolia var. javanica]
                                             Emilia sonchifolia
                                               Emilia sonchifolia var. sonchifolia
                                                     [Cacalia sonchifolia]
                                     Encelia
                                             Encelia actonii
                                                   [Encelia frutescens var. actonii]
                                                   [Encelia virginensis subsp. actonii]
                                                   [Encelia virginensis var. actonii]
                                             Encelia californica
                                             Encelia farinosa
                                                   [Encelia farinosa var. phenicodonta]
                                                   [Encelia farinosa var. radians]
                                               Encelia farinosa var. farinosa
                                             Encelia frutescens
                                                   [Simsia frutescens]
                                               Encelia frutescens var. frutescens
                                             Encelia nutans
                                                   [Enceliopsis nutans]
                                             Encelia resinifera
                                                   [Encelia frutescens var. resinosa]
                                                   [Encelia resinifera subsp. tenuifolia]
                                               Encelia resinifera subsp. resinifera
                                                     [Encelia frutescens var. resinosa]
                                             Encelia scaposa
                                                   [Encelia scaposa var. stenophylla]
                                                   [Simsia scaposa]
                                             Encelia virginensis
                                                   [Encelia frutescens var. virginensis]
                                               Encelia virginensis var. virginensis
                                     Enceliopsis
                                             Enceliopsis argophylla
                                                   [Tithonia argophylla]
                                             Enceliopsis covillei
                                                   [Enceliopsis argophylla var. grandiflora]
                                                   [Helianthella covillei]
                                             Enceliopsis nudicaulis
                                                   [Encelia nudicaulis]
                                                   [Enceliopsis nudicaulis var. corrugata]
                                               Enceliopsis nudicaulis var. nudicaulis
                                                     [Encelia nudicaulis]
                                     Endorima
                                     Engelmannia
                                             Engelmannia peristenia
                                             Engelmannia pinnatifida
                                     Enydra
                                             Enydra fluctuans
                                             Enydra sessilis
                                     Enydria
                                     Erechtites
                                             Erechtites glomerata
                                                   [Erechtites arguta]
                                                   [Senecio glomeratus]
                                               Erechtites glomerata subsp. glomerata
                                                     [Erechtites arguta]
                                                     [Senecio glomeratus]
                                             Erechtites hieraciifolia
                                                   [Erechtites hieracifolia]
                                                   [Erechtites hieraciifolius]
                                               Erechtites hieraciifolia var. cacalioides
                                                     [Senecio cacalioides]
                                               Erechtites hieraciifolia var. hieraciifolia
                                                     [Erechtites hieraciifolia var. intermedia]
                                                     [Erechtites hieraciifolia var. praealta]
                                                     [Senecio hieraciifolius]
                                               Erechtites hieraciifolia var. megalocarpa
                                                     [Erechtites megalocarpa]
                                             Erechtites minima
                                                   [Senecio minimus]
                                             Erechtites minimus
                                                   [Senecio minimus]
                                             Erechtites prenanthoides
                                             Erechtites valerianifolia
                                                   [Senecio valerianifolius]
                                             Erechtites valerianifolius
                                                   [Senecio valerianifolius]
                                     Eremanthus
                                             Eremanthus capitatus
                                     Ericameria
                                             Ericameria albida
                                                   [Chrysothamnus albidus]
                                             Ericameria arborescens
                                                   [Haplopappus arborescens]
                                                   [Linosyris arborescens]
                                             Ericameria bloomeri
                                                   [Aster bloomeri]
                                                   [Haplopappus bloomeri subsp. sonnei]
                                                   [Haplopappus bloomeri var. angustatus]
                                                   [Haplopappus bloomeri var. sonnei]
                                                   [Haplopappus bloomeri]
                                             Ericameria bolanderi
                                                   [Chrysothamnus bolanderi]
                                                   [Chrysothamnus nauseosus subsp. bolanderi]
                                             Ericameria brachylepis
                                                   [Bigelovia brachylepis]
                                                   [Haplopappus propinquus]
                                             Ericameria cervina
                                                   [Haplopappus cervinus]
                                             Ericameria compacta
                                                   [Haplopappus bloomeri subsp. compactus]
                                                   [Haplopappus compactus]
                                             Ericameria cooperi
                                                   [Haplopappus cooperi]
                                               Ericameria cooperi var. cooperi
                                             Ericameria crispa
                                                   [Haplopappus crispus]
                                             Ericameria cuneata
                                                   [Haplopappus cuneatus]
                                               Ericameria cuneata var. cuneata
                                                     [Haplopappus cuneatus]
                                               Ericameria cuneata var. macrocephala
                                               Ericameria cuneata var. spathulata
                                                     [Haplopappus cuneatus var. spathulatus]
                                             Ericameria discoidea
                                                   [Haplopappus macronema]
                                               Ericameria discoidea var. discoidea
                                                     [Haplopappus macronema var. typicus]
                                                     [Haplopappus macronema]
                                                     [Macronema discoidea]
                                             Ericameria ericoides
                                                   [Diplopappus ericoides]
                                                   [Haplopappus ericoides subsp. blakei]
                                                   [Haplopappus ericoides]
                                             Ericameria fasciculata
                                                   [Chrysoma fasciculata]
                                                   [Haplopappus eastwoodiae]
                                             Ericameria gilmanii
                                                   [Haplopappus gilmanii]
                                             Ericameria greenei
                                                   [Haplopappus bloomeri var. greenei]
                                                   [Haplopappus greenei subsp. mollis]
                                                   [Haplopappus greenei var. mollis]
                                                   [Haplopappus greenei]
                                                   [Macronema greenei]
                                             Ericameria laricifolia
                                                   [Haplopappus laricifolius]
                                             Ericameria lignumviridis
                                                   [Haplopappus lignumviridis]
                                             Ericameria linearifolia
                                                   [Haplopappus linearifolius subsp. interior]
                                                   [Haplopappus linearifolius var. interior]
                                                   [Haplopappus linearifolius]
                                                   [Stenotopsis interior]
                                                   [Stenotopsis linearifolia var. interior]
                                                   [Stenotopsis linearifolia]
                                             Ericameria linearis
                                                   [Ericameria discoidea var. linearis]
                                                   [Haplopappus macronema subsp. linearis]
                                                   [Haplopappus macronema var. linearis]
                                                   [Macronema lineare]
                                             Ericameria monocephala
                                                   [Chrysothamnus parryi var. monocephalus]
                                                   [Ericameria parryi var. monocephala]
                                             Ericameria nana
                                                   [Haplopappus cervinus]
                                                   [Haplopappus nanus]
                                             Ericameria nauseosa
                                                   [Chrysothamnus frigidus]
                                                   [Chrysothamnus nauseosus var. nauseosus]
                                                   [Chrysothamnus nauseosus]
                                               Ericameria nauseosa subsp. nauseosa
                                               Ericameria nauseosa var. arenaria
                                                     [Chrysothamnus nauseosus subsp. arenarius]
                                                     [Chrysothamnus nauseosus var. arenarius]
                                               Ericameria nauseosa var. bernardina
                                                     [Chrysothamnus nauseosus subsp. bernardinus]
                                               Ericameria nauseosa var. bigelovii
                                                     [Chrysothamnus nauseosus subsp. bigelovii]
                                                     [Chrysothamnus nauseosus var. bigelovii]
                                               Ericameria nauseosa var. ceruminosa
                                                     [Chrysothamnus nauseosus subsp. ceruminosus]
                                                     [Chrysothamnus nauseosus subsp. consimilis]
                                               Ericameria nauseosa var. glabrata
                                                     [Chrysothamnus graveolens]
                                                     [Chrysothamnus nauseosus subsp. graveolens]
                                                     [Chrysothamnus nauseosus var. glabratus]
                                                     [Chrysothamnus nauseosus var. graveolens]
                                                     [Chrysothamnus nauseosus var. petrophilus]
                                               Ericameria nauseosa var. glareosa
                                               Ericameria nauseosa var. graveolens
                                                     [Chrysothamnus graveolens]
                                                     [Chrysothamnus nauseosus subsp. graveolens]
                                                     [Chrysothamnus nauseosus var. graveolens]
                                                     [Chrysothamnus nauseosus var. petrophilus]
                                               Ericameria nauseosa var. hololeuca
                                                     [Chrysothamnus nauseosus subsp. gnaphalodes]
                                                     [Chrysothamnus nauseosus subsp. hololeucus]
                                                     [Chrysothamnus nauseosus var. gnaphalodes]
                                                     [Chrysothamnus nauseosus var. hololeucus]
                                               Ericameria nauseosa var. iridis
                                                     [Chrysothamnus nauseosus subsp. iridis]
                                                     [Chrysothamnus nauseosus var. iridis]
                                               Ericameria nauseosa var. juncea
                                                     [Chrysothamnus nauseosus subsp. junceus]
                                                     [Chrysothamnus nauseosus var. junceus]
                                               Ericameria nauseosa var. latisquamea
                                                     [Chrysothamnus nauseosus subsp. latisquameus]
                                                     [Chrysothamnus nauseosus var. latisquameus]
                                               Ericameria nauseosa var. leiosperma
                                                     [Chrysothamnus nauseosus subsp. leiospermus]
                                                     [Chrysothamnus nauseosus var. leiospermus]
                                               Ericameria nauseosa var. mohavensis
                                                     [Aster mohavensis]
                                                     [Chrysothamnus nauseosus subsp. mohavensis]
                                                     [Chrysothamnus nauseosus var. mohavensis]
                                               Ericameria nauseosa var. nana
                                                     [Chrysothamnus nauseosus subsp. nanus]
                                                     [Chrysothamnus nauseosus var. nanus]
                                               Ericameria nauseosa var. nauseosa
                                                     [Chrysothamnus frigidus]
                                                     [Chrysothamnus nauseosus var. nauseosus]
                                                     [Chrysothamnus nauseosus var. typicus]
                                                     [Chrysothamnus nauseosus]
                                               Ericameria nauseosa var. nitida
                                                     [Chrysothamnus nauseosus subsp. nitidus]
                                                     [Chrysothamnus nauseosus var. nitidus]
                                               Ericameria nauseosa var. oreophila
                                                     [Chrysothamnus nauseosus subsp. consimilis]
                                                     [Chrysothamnus nauseosus subsp. pinifolius]
                                                     [Chrysothamnus nauseosus var. artus]
                                                     [Chrysothamnus nauseosus var. consimilis]
                                                     [Chrysothamnus nauseosus var. oreophilus]
                                                     [Ericameria nauseosa subsp. consimilis]
                                                     [Ericameria nauseosa var. arta]
                                               Ericameria nauseosa var. psilocarpa
                                                     [Chrysothamnus nauseosus subsp. psilocarpus]
                                                     [Chrysothamnus nauseosus var. psilocarpus]
                                               Ericameria nauseosa var. salicifolia
                                                     [Chrysothamnus nauseosus subsp. salicifolius]
                                                     [Chrysothamnus nauseosus var. salicifolius]
                                               Ericameria nauseosa var. speciosa
                                                     [Chrysothamnus nauseosus subsp. albicaulis]
                                                     [Chrysothamnus nauseosus subsp. speciosus]
                                                     [Chrysothamnus nauseosus var. albicaulis]
                                                     [Chrysothamnus nauseosus var. speciosus]
                                               Ericameria nauseosa var. texensis
                                                     [Chrysothamnus nauseosus subsp. texensis]
                                               Ericameria nauseosa var. turbinata
                                                     [Chrysothamnus nauseosus subsp. turbinatus]
                                                     [Chrysothamnus nauseosus var. turbinatus]
                                               Ericameria nauseosa var. washoensis
                                                     [Chrysothamnus nauseosus subsp. washoensis]
                                                     [Chrysothamnus nauseosus var. washoensis]
                                             Ericameria obovata
                                                   [Haplopappus rydbergii]
                                                   [Haplopappus watsonii var. rydbergii]
                                                   [Macronema obovatum]
                                             Ericameria ophitidis
                                                   [Haplopappus bloomeri var. ophitidis]
                                                   [Haplopappus ophitidis]
                                             Ericameria palmeri
                                                   [Haplopappus palmeri]
                                                   [Isocoma palmeri]
                                               Ericameria palmeri var. pachylepis
                                                     [Haplopappus palmeri subsp. pachylepis]
                                                     [Xylothamia palmeri var. pachylepis]
                                               Ericameria palmeri var. palmeri
                                                     [Haplopappus palmeri]
                                             Ericameria paniculata
                                                   [Chrysothamnus paniculatus]
                                             Ericameria parishii
                                                   [Haplopappus parishii]
                                               Ericameria parishii var. parishii
                                             Ericameria parryi
                                                   [Chrysothamnus parryi]
                                               Ericameria parryi var. affinis
                                                     [Chrysothamnus parryi subsp. affinis]
                                                     [Chrysothamnus parryi var. affinis]
                                               Ericameria parryi var. aspera
                                                     [Chrysothamnus parryi subsp. asper]
                                                     [Chrysothamnus parryi var. asper]
                                               Ericameria parryi var. aspra
                                                     [Chrysothamnus parryi subsp. asper]
                                                     [Chrysothamnus parryi var. asper]
                                               Ericameria parryi var. attenuata
                                                     [Chrysothamnus parryi subsp. attenuatus]
                                                     [Chrysothamnus parryi var. attenuatus]
                                               Ericameria parryi var. howardii
                                                     [Chrysothamnus howardii]
                                                     [Chrysothamnus parryi subsp. howardii]
                                                     [Chrysothamnus parryi var. howardii]
                                               Ericameria parryi var. imula
                                                     [Chrysothamnus parryi subsp. imulus]
                                               Ericameria parryi var. latior
                                                     [Chrysothamnus parryi subsp. latior]
                                               Ericameria parryi var. montana
                                                     [Chrysothamnus parryi subsp. montanus]
                                               Ericameria parryi var. nevadensis
                                                     [Chrysothamnus parryi subsp. nevadensis]
                                                     [Chrysothamnus parryi var. nevadensis]
                                               Ericameria parryi var. parryi
                                                     [Chrysothamnus parryi subsp. typicus]
                                                     [Chrysothamnus parryi]
                                               Ericameria parryi var. salmonensis
                                                     [Chrysothamnus parryi subsp. salmonensis]
                                               Ericameria parryi var. vulcanica
                                                     [Chrysothamnus parryi subsp. vulcanicus]
                                                     [Chrysothamnus parryi var. vulcanicus]
                                             Ericameria pinifolia
                                                   [Haplopappus pinifolius]
                                             Ericameria resinosa
                                                   [Haplopappus resinosus]
                                             Ericameria suffruticosa
                                                   [Haplopappus suffruticosus]
                                                   [Macronema suffruticosum]
                                             Ericameria teretifolia
                                                   [Chrysothamnus teretifolius]
                                             Ericameria uintahensis
                                                   [Chrysothamnus nauseosus subsp. uintahensis]
                                                   [Chrysothamnus nauseosus var. uintahensis]
                                             Ericameria viscosa
                                                   [Chrysothamnus nauseosus subsp. viscosus]
                                             Ericameria watsonii
                                                   [Haplopappus suffruticosus]
                                                   [Haplopappus watsonii]
                                                   [Macronema watsonii]
                                             Ericameria zionis
                                                   [Haplopappus zionis]
                                     Erigeron
                                             Erigeron abajoensis
                                                   [Erigeron awapensis]
                                             Erigeron acomanus
                                             Erigeron acris
                                               Erigeron acris subsp. acris
                                                     [Erigeron acris var. asteroides]
                                                     [Erigeron elongatus]
                                                     [Trimorpha acris]
                                               Erigeron acris subsp. angulosus
                                                     [Erigeron angulosus]
                                               Erigeron acris subsp. kamtschaticus
                                                     [Erigeron acris var. kamtschaticus]
                                                     [Erigeron kamtschaticus]
                                                     [Trimorpha acris var. kamtschatica]
                                               Erigeron acris subsp. politus
                                                     [Erigeron acris var. asteroides]
                                                     [Erigeron droebachensis]
                                                     [Erigeron elongatus]
                                                     [Erigeron politus]
                                                     [Trimorpha acris var. asteroides]
                                                     [Trimorpha elongata]
                                             Erigeron adscendens
                                             Erigeron aequifolius
                                             Erigeron algidus
                                             Erigeron aliceae
                                             Erigeron allocotus
                                             Erigeron alpinus
                                             Erigeron anchana
                                             Erigeron annuus
                                                   [Erigeron annuus var. discoideus]
                                                   [Erigeron annuus/strigosus]
                                                   [Stenactis annua]
                                             Erigeron aphanactis
                                                   [Erigeron concinnus var. aphanactis]
                                               Erigeron aphanactis var. aphanactis
                                                     [Erigeron concinnus var. aphanactis]
                                               Erigeron aphanactis var. congestus
                                             Erigeron arenarioides
                                             Erigeron argentatus
                                             Erigeron arisolius
                                             Erigeron arizonicus
                                                   [Erigeron rusbyi]
                                             Erigeron asper
                                             Erigeron asperugineus
                                             Erigeron aureus
                                               Erigeron aureus var. aureus
                                                     [Haplopappus brandegeei]
                                             Erigeron barbellulatus
                                             Erigeron basalticus
                                             Erigeron bellidiastrum
                                               Erigeron bellidiastrum var. arenarius
                                                     [Erigeron arenarius]
                                               Erigeron bellidiastrum var. bellidiastrum
                                               Erigeron bellidiastrum var. robustus
                                             Erigeron bellioides
                                             Erigeron bigelovii
                                             Erigeron biolettii
                                                   [Erigeron inornatus var. biolettii]
                                             Erigeron blochmaniae
                                                   [Erigeron foliosus var. blochmaniae]
                                             Erigeron bloomeri
                                                   [Erigeron bloomeri var. pubens]
                                               Erigeron bloomeri var. bloomeri
                                                     [Erigeron bloomeri var. typicus]
                                               Erigeron bloomeri var. nudatus
                                             Erigeron bonariensis
                                                   [Conyza bonariensis]
                                                   [Erigeron crispus]
                                                   [Leptilon linifolium]
                                             Erigeron breweri
                                               Erigeron breweri var. bisanctus
                                               Erigeron breweri var. breweri
                                               Erigeron breweri var. covillei
                                                     [Erigeron foliosus var. covillei]
                                               Erigeron breweri var. jacinteus
                                               Erigeron breweri var. porphyreticus
                                             Erigeron caespitosus
                                                   [Erigeron caespitosus var. laccoliticus]
                                             Erigeron calcicola
                                                   [Erigeron strigosus var. calcicola]
                                             Erigeron calvus
                                             Erigeron canaani
                                             Erigeron canadensis
                                                   [Conyza canadensis var. canadensis]
                                                   [Conyza canadensis var. glabrata]
                                                   [Conyza canadensis var. pusilla]
                                                   [Conyza canadensis]
                                                   [Conyza parva]
                                                   [Erigeron canadensis var. pusillus]
                                                   [Erigeron pusillus]
                                                   [Leptilon pusillum]
                                             Erigeron canus
                                             Erigeron cascadensis
                                             Erigeron cavernensis
                                             Erigeron cervinus
                                                   [Erigeron delicatus]
                                             Erigeron chrysopsidis
                                               Erigeron chrysopsidis var. austiniae
                                                     [Erigeron austiniae]
                                               Erigeron chrysopsidis var. brevifolius
                                             Erigeron clokeyi
                                               Erigeron clokeyi var. pinzliae
                                             Erigeron compactus
                                             Erigeron compositus
                                                   [Erigeron compositus var. discoideus]
                                                   [Erigeron compositus var. glabratus]
                                                   [Erigeron compositus var. multifidus]
                                                   [Erigeron compositus var. typicus]
                                             Erigeron concinnus
                                                   [Distasis concinna]
                                                   [Erigeron brandegeei]
                                                   [Erigeron pumilus subsp. concinnoides]
                                                   [Erigeron pumilus var. concinnus]
                                               Erigeron concinnus var. concinnus
                                                     [Distasis concinna]
                                                     [Erigeron brandegeei]
                                                     [Erigeron pumilus subsp. concinnoides]
                                                     [Erigeron pumilus var. concinnus]
                                                     [Erigeron pumilus var. euconcinnoides]
                                               Erigeron concinnus var. condensatus
                                                     [Erigeron condensatus]
                                                     [Erigeron pumilus var. condensatus]
                                               Erigeron concinnus var. subglaber
                                                     [Erigeron perglaber]
                                                     [Erigeron pumilus var. subglaber]
                                                     [Erigeron zothecinus]
                                             Erigeron consimilis
                                                   [Erigeron compactus var. consimilis]
                                             Erigeron corymbosus
                                             Erigeron coulteri
                                             Erigeron cronquistii
                                             Erigeron cuneifolius
                                             Erigeron davisii
                                                   [Erigeron engelmannii subsp. davisii]
                                                   [Erigeron engelmannii var. davisii]
                                             Erigeron decumbens
                                               Erigeron decumbens var. decumbens
                                             Erigeron delphiniifolius
                                             Erigeron denalii
                                                   [Erigeron mexiae]
                                             Erigeron disparipilus
                                             Erigeron divergens
                                                   [Erigeron divaricatus]
                                                   [Erigeron divergens var. typicus]
                                             Erigeron dolomiticola
                                                   [Erigeron strigosus var. dolomiticola]
                                             Erigeron eatonii
                                               Erigeron eatonii var. eatonii
                                                     [Erigeron eatonii subsp. typicus]
                                               Erigeron eatonii var. lavandulus
                                               Erigeron eatonii var. nevadincola
                                                     [Erigeron nevadincola]
                                               Erigeron eatonii var. plantagineus
                                                     [Erigeron eatonii subsp. plantagineus]
                                               Erigeron eatonii var. sonnei
                                                     [Erigeron nevadensis var. sonnei]
                                                     [Erigeron sonnei]
                                               Erigeron eatonii var. villosus
                                                     [Erigeron eatonii subsp. villosus]
                                             Erigeron elatior
                                                   [Erigeron grandiflorus var. elatior]
                                             Erigeron elatus
                                                   [Erigeron acris var. elatus]
                                                   [Erigeron alpinus var. elatus]
                                                   [Erigeron elatus var. oligocephalus]
                                                   [Trimorpha elata]
                                             Erigeron elegantulus
                                                   [Erigeron linearis var. elegantulus]
                                             Erigeron elmeri
                                                   [Erigeron breweri var. elmeri]
                                             Erigeron engelmannii
                                               Erigeron engelmannii var. engelmannii
                                                     [Erigeron engelmannii subsp. typicus]
                                             Erigeron eriocephalus
                                                   [Erigeron uniflorus subsp. eriocephalus]
                                             Erigeron evermannii
                                             Erigeron eximius
                                                   [Erigeron eximius/Erigeron peregrinus callianthemus]
                                                   [Erigeron superbus]
                                             Erigeron filifolius
                                                   [Erigeron filifolius var. robustior]
                                               Erigeron filifolius var. filifolius
                                                     [Erigeron filifolius var. typicus]
                                             Erigeron flabellifolius
                                             Erigeron flagellaris
                                                   [Erigeron flagellaris var. typicus]
                                                   [Erigeron nudiflorus]
                                             Erigeron flagellifolius
                                                   [Conyza linifolia]
                                             Erigeron flettii
                                             Erigeron floribundus
                                                   [Conyza bonariensis var. leiotheca]
                                                   [Conyza floribunda]
                                             Erigeron foliosus
                                                   [Erigeron foliosus var. stenophyllus]
                                               Erigeron foliosus var. confinis
                                               Erigeron foliosus var. foliosus
                                                     [Erigeron foliosus var. stenophyllus]
                                               Erigeron foliosus var. franciscensis
                                               Erigeron foliosus var. hartwegii
                                               Erigeron foliosus var. mendocinus
                                                     [Erigeron mendocinus]
                                             Erigeron formosissimus
                                                   [Erigeron formosissimus var. typicus]
                                                   [Erigeron glabellus var. viscidus]
                                                   [Erigeron viscidus]
                                               Erigeron formosissimus var. formosissimus
                                               Erigeron formosissimus var. viscidus
                                                     [Erigeron glabellus var. viscidus]
                                                     [Erigeron viscidus]
                                             Erigeron garrettii
                                                   [Erigeron controversus]
                                             Erigeron geiseri
                                             Erigeron glabellus
                                                   [Erigeron asperum]
                                                   [Erigeron oblanceolatus]
                                               Erigeron glabellus var. glabellus
                                                     [Erigeron asperum]
                                                     [Erigeron glabellus subsp. typicus]
                                                     [Erigeron oblanceolatus]
                                               Erigeron glabellus var. pubescens
                                                     [Erigeron anodonta]
                                                     [Erigeron asperum var. pubescens]
                                                     [Erigeron glabellus subsp. pubescens]
                                                     [Erigeron oligodontus]
                                             Erigeron glacialis
                                                   [Erigeron callianthemus]
                                                   [Erigeron peregrinus subsp. callianthemus]
                                                   [Erigeron peregrinus var. angustifolius]
                                                   [Erigeron peregrinus var. callianthemus]
                                                   [Erigeron peregrinus var. eucallianthemus]
                                                   [Erigeron peregrinus var. scaposus]
                                               Erigeron glacialis var. hirsutus
                                                     [Erigeron peregrinus var. hirsutus]
                                             Erigeron glaucus
                                             Erigeron goodrichii
                                             Erigeron gracilis
                                             Erigeron grandiflorus
                                                   [Erigeron simplex]
                                               Erigeron grandiflorus subsp. grandiflorus
                                             Erigeron greenei
                                                   [Erigeron angustatus]
                                             Erigeron heliographis
                                             Erigeron hessii
                                             Erigeron howellii
                                             Erigeron hultenii
                                             Erigeron humilis
                                                   [Erigeron unalaschkensis]
                                                   [Erigeron uniflorus var. unalaschkensis]
                                             Erigeron hyperboreus
                                                   [Erigeron alaskanus]
                                             Erigeron hyssopifolius
                                               Erigeron hyssopifolius var. hyssopifolius
                                             Erigeron inornatus
                                               Erigeron inornatus var. calidipetris
                                               Erigeron inornatus var. inornatus
                                               Erigeron inornatus var. keilii
                                             Erigeron jamaicensis
                                             Erigeron jonesii
                                                   [Erigeron wahwahensis]
                                             Erigeron kachinensis
                                             Erigeron karvinskianus
                                             Erigeron klamathensis
                                                   [Erigeron breweri var. klamathensis]
                                             Erigeron kuschei
                                             Erigeron lackschewitzii
                                             Erigeron laevigatus
                                                   [Conyza apurensis]
                                                   [Conyza laevigata]
                                                   [Erigeron apurensis]
                                                   [Erigeron chinensis]
                                                   [Erigeron spathulatus]
                                             Erigeron lanatus
                                             Erigeron lassenianus
                                                   [Erigeron flexuosus]
                                               Erigeron lassenianus var. deficiens
                                               Erigeron lassenianus var. lassenianus
                                                     [Erigeron flexuosus]
                                             Erigeron latus
                                             Erigeron leibergii
                                             Erigeron leiomerus
                                             Erigeron lemmonii
                                             Erigeron linearis
                                                   [Erigeron peucephyllus]
                                             Erigeron lobatus
                                             Erigeron lonchophyllus
                                                   [Erigeron lonchophyllus var. laurentianus]
                                                   [Erigeron minor]
                                                   [Trimorpha lonchophylla]
                                             Erigeron maguirei
                                                   [Erigeron maguirei var. harrisonii]
                                             Erigeron mancus
                                             Erigeron maniopotamicus
                                             Erigeron mariposanus
                                             Erigeron melanocephalus
                                                   [Erigeron uniflorus var. melanocephalus]
                                             Erigeron miser
                                             Erigeron modestus
                                                   [Erigeron lobatus var. warnockii]
                                                   [Erigeron plateauensis]
                                                   [Erigeron warnockii]
                                             Erigeron muirii
                                                   [Erigeron grandiflorus subsp. muirii]
                                             Erigeron multiceps
                                             Erigeron nanus
                                             Erigeron nauseosus
                                             Erigeron nematophyllus
                                             Erigeron neomexicanus
                                                   [Erigeron delphiniifolius subsp. neomexicanus]
                                                   [Erigeron delphiniifolius var. euneomexicanus]
                                             Erigeron nivalis
                                                   [Erigeron acris subsp. debilis]
                                                   [Erigeron acris var. debilis]
                                                   [Erigeron angulosus subsp. debilis]
                                                   [Erigeron debilis]
                                                   [Erigeron jucundus]
                                                   [Trimorpha acris var. debilis]
                                             Erigeron ochroleucus
                                                   [Erigeron ochroleucus var. scribneri]
                                               Erigeron ochroleucus var. ochroleucus
                                             Erigeron oreganus
                                             Erigeron oreophilus
                                                   [Erigeron delphiniifolius var. oreophilus]
                                             Erigeron ovinus
                                             Erigeron oxyphyllus
                                             Erigeron pallens
                                                   [Erigeron purpuratus subsp. pallens]
                                             Erigeron parishii
                                             Erigeron parryi
                                             Erigeron peregrinus
                                                   [Erigeron eximius/Erigeron peregrinus callianthemus]
                                               Erigeron peregrinus subsp. peregrinus
                                                     [Erigeron peregrinus var. dawsonii]
                                               Erigeron peregrinus var. peregrinus
                                                     [Erigeron unalaschkensis]
                                               Erigeron peregrinus var. thompsonii
                                             Erigeron petiolaris
                                             Erigeron petrophilus
                                               Erigeron petrophilus var. petrophilus
                                               Erigeron petrophilus var. sierrensis
                                               Erigeron petrophilus var. viscidulus
                                                     [Erigeron inornatus var. viscidulus]
                                             Erigeron philadelphicus
                                                   [Erigeron philadelphicus var. scaturicola]
                                                   [Erigeron purpureus]
                                               Erigeron philadelphicus var. glaber
                                               Erigeron philadelphicus var. philadelphicus
                                                     [Erigeron philadelphicus var. scaturicola]
                                                     [Erigeron purpureus]
                                               Erigeron philadelphicus var. provancheri
                                                     [Erigeron philadelphicus subsp. provancheri]
                                                     [Erigeron provancheri]
                                             Erigeron pinnatisectus
                                                   [Erigeron compositus var. pinnatisectus]
                                             Erigeron piperianus
                                             Erigeron piscaticus
                                             Erigeron poliospermus
                                               Erigeron poliospermus var. cereus
                                               Erigeron poliospermus var. poliospermus
                                                     [Erigeron poliospermus var. typicus]
                                             Erigeron porsildii
                                                   [Erigeron grandiflorus subsp. arcticus]
                                             Erigeron primulifolius
                                                   [Conyza chilensis]
                                                   [Conyza primulifolia]
                                                   [Leptilon chinense]
                                             Erigeron pringlei
                                             Erigeron procumbens
                                                   [Aster procumbens]
                                                   [Erigeron myrionactis]
                                                   [Erigeron repens]
                                             Erigeron pubescens
                                             Erigeron pulchellus
                                                   [Erigeron bellidifolius]
                                               Erigeron pulchellus var. brauniae
                                               Erigeron pulchellus var. pulchellus
                                                     [Erigeron bellidifolius]
                                               Erigeron pulchellus var. tolsteadii
                                             Erigeron pulcherrimus
                                                   [Erigeron bistiensis]
                                                   [Erigeron pulcherrimus var. wyomingia]
                                                   [Erigeron wyomingia]
                                             Erigeron pumilus
                                               Erigeron pumilus subsp. pumilus
                                                     [Erigeron pumilus subsp. typicus]
                                               Erigeron pumilus var. intermedius
                                                     [Erigeron pumilus subsp. intermedius]
                                                     [Erigeron pumilus var. euintermedius]
                                                     [Erigeron pumilus var. gracilior]
                                               Erigeron pumilus var. pumilus
                                             Erigeron purpuratus
                                               Erigeron purpuratus var. purpuratus
                                             Erigeron pygmaeus
                                             Erigeron quercifolius
                                             Erigeron radicatus
                                                   [Erigeron huberi]
                                             Erigeron ramosissimus
                                                   [Conyza ramosissima]
                                                   [Leptilon divaricatum]
                                             Erigeron reductus
                                                   [Erigeron inornatus var. reductus]
                                               Erigeron reductus var. angustatus
                                                     [Erigeron inornatus var. angustatus]
                                               Erigeron reductus var. reductus
                                                     [Erigeron inornatus var. reductus]
                                             Erigeron religiosus
                                             Erigeron rhizomatus
                                             Erigeron robustior
                                                   [Erigeron decumbens subsp. robustior]
                                                   [Erigeron decumbens var. robustior]
                                             Erigeron rybius
                                             Erigeron rydbergii
                                             Erigeron salishii
                                             Erigeron salmonensis
                                             Erigeron sanctarum
                                             Erigeron saxatilis
                                             Erigeron sceptrifer
                                             Erigeron scopulinus
                                             Erigeron serpentinus
                                             Erigeron sionis
                                               Erigeron sionis var. trilobatus
                                                     [Erigeron flagellaris var. trilobatus]
                                                     [Erigeron proselyticus]
                                             Erigeron sivinskii
                                             Erigeron sparsifolius
                                                   [Erigeron utahensis var. sparsifolius]
                                             Erigeron speciosus
                                                   [Erigeron conspicuus]
                                                   [Erigeron macranthus]
                                                   [Erigeron speciosus var. conspicuus]
                                                   [Erigeron speciosus var. macranthus]
                                                   [Erigeron speciosus var. mollis]
                                                   [Erigeron subtrinervis subsp. conspicuus]
                                                   [Erigeron subtrinervis var. conspicuus]
                                               Erigeron speciosus var. speciosus
                                                     [Erigeron speciosus var. typicus]
                                             Erigeron stanselliae
                                             Erigeron strigosus
                                                   [Erigeron annuus subsp. strigosus]
                                                   [Erigeron annuus/strigosus]
                                                   [Erigeron ramosus var. beyrichii]
                                                   [Erigeron ramosus]
                                                   [Erigeron strigosus var. beyrichii]
                                                   [Erigeron strigosus var. discoideus]
                                                   [Erigeron strigosus var. eligulatus]
                                                   [Stenactis strigosa]
                                               Erigeron strigosus var. septentrionalis
                                                     [Erigeron strigosus subsp. septentrionalis]
                                               Erigeron strigosus var. strigosus
                                                     [Erigeron annuus subsp. strigosus]
                                                     [Erigeron ramosus]
                                                     [Erigeron strigosus var. discoideus]
                                                     [Erigeron strigosus var. eligulatus]
                                                     [Erigeron strigosus var. typicus]
                                                     [Erigeron traversii]
                                                     [Stenactis strigosa]
                                               Erigeron strigosus var. traversii
                                                     [Erigeron traversii]
                                             Erigeron subglaber
                                             Erigeron subtrinervis
                                                   [Erigeron glabellus var. mollis]
                                               Erigeron subtrinervis var. subtrinervis
                                                     [Erigeron glabellus var. mollis]
                                                     [Erigeron speciosus var. mollis]
                                                     [Erigeron subtrinervis subsp. typicus]
                                             Erigeron supplex
                                             Erigeron tenellus
                                             Erigeron tener
                                             Erigeron tenuis
                                             Erigeron tracyi
                                                   [Erigeron colomexicanus]
                                                   [Erigeron divergens var. cinereus]
                                             Erigeron trifidus
                                             Erigeron tweedyi
                                             Erigeron uintahensis
                                                   [Erigeron speciosus var. uintahensis]
                                             Erigeron uncialis
                                               Erigeron uncialis subsp. uncialis
                                               Erigeron uncialis var. conjugans
                                                     [Erigeron uncialis subsp. conjugans]
                                               Erigeron uncialis var. uncialis
                                             Erigeron uniflorus
                                               Erigeron uniflorus var. eriocephalus
                                             Erigeron untermannii
                                                   [Erigeron carringtoniae]
                                             Erigeron ursinus
                                             Erigeron utahensis
                                                   [Erigeron utahensis var. tetrapleuris]
                                               Erigeron utahensis var. utahensis
                                                     [Erigeron utahensis var. tetrapleuris]
                                             Erigeron vagus
                                             Erigeron velutipes
                                             Erigeron vernus
                                             Erigeron versicolor
                                                   [Achaetogeron chihuahuensis]
                                                   [Achaetogeron versicolor]
                                                   [Erigeron geiseri var. calcicola]
                                                   [Erigeron gilensis]
                                                   [Erigeron mimegletes]
                                             Erigeron vetensis
                                             Erigeron vicinus
                                             Erigeron vreelandii
                                                   [Erigeron platyphyllus]
                                             Erigeron watsonii
                                                   [Aster watsonii]
                                             Erigeron wilkenii
                                             Erigeron yukonensis
                                                   [Erigeron glabellus var. yukonensis]
                                     Eriophyllum
                                             Eriophyllum ambiguum
                                               Eriophyllum ambiguum var. ambiguum
                                               Eriophyllum ambiguum var. paleaceum
                                             Eriophyllum confertiflorum
                                                   [Eriophyllum confertiflorum var. latum]
                                                   [Eriophyllum confertiflorum var. laxiflorum]
                                               Eriophyllum confertiflorum var. confertiflorum
                                                     [Eriophyllum confertiflorum var. discoideum]
                                                     [Eriophyllum confertiflorum var. latum]
                                                     [Eriophyllum confertiflorum var. laxiflorum]
                                                     [Eriophyllum confertiflorum var. tridactylum]
                                               Eriophyllum confertiflorum var. tanacetiflorum
                                                     [Eriophyllum tanacetiflorum]
                                             Eriophyllum congdonii
                                                   [Eriophyllum nubigenum var. congdonii]
                                             Eriophyllum jepsonii
                                             Eriophyllum lanatum
                                               Eriophyllum lanatum var. achillaeoides
                                                     [Eriophyllum lanatum var. aphanactis]
                                               Eriophyllum lanatum var. arachnoideum
                                               Eriophyllum lanatum var. croceum
                                               Eriophyllum lanatum var. grandiflorum
                                               Eriophyllum lanatum var. hallii
                                               Eriophyllum lanatum var. integrifolium
                                                     [Eriophyllum integrifolium]
                                                     [Eriophyllum lanatum var. cuneatum]
                                                     [Eriophyllum lanatum var. monoense]
                                               Eriophyllum lanatum var. lanatum
                                                     [Eriophyllum lanatum var. typicum]
                                               Eriophyllum lanatum var. lanceolatum
                                               Eriophyllum lanatum var. leucophyllum
                                               Eriophyllum lanatum var. obovatum
                                             Eriophyllum lanosum
                                                   [Antheropeas lanosum]
                                             Eriophyllum latilobum
                                             Eriophyllum mohavense
                                             Eriophyllum multicaule
                                             Eriophyllum nubigenum
                                             Eriophyllum pringlei
                                             Eriophyllum stoechadifolium
                                                   [Eriophyllum stoechadifolium var. artemisiifolium]
                                                   [Eriophyllum stoechadifolium var. depressum]
                                             Eriophyllum wallacei
                                                   [Antheropeas wallacei]
                                                   [Eriophyllum wallacei var. calvescens]
                                                   [Eriophyllum wallacei var. rubellum]
                                               Eriophyllum wallacei var. australe
                                     Eschenbachia
                                     Espeletia
                                     Ethulia
                                     Eucephalus
                                             Eucephalus breweri
                                                   [Aster breweri]
                                                   [Chrysopsis breweri var. multibracteata]
                                                   [Chrysopsis breweri]
                                                   [Chrysopsis gracilis]
                                                   [Chrysopsis wrightii]
                                                   [Heterotheca breweri]
                                             Eucephalus elegans
                                                   [Aster elegans]
                                                   [Aster perelegans]
                                                   [Eucephalus perelegans]
                                             Eucephalus engelmannii
                                                   [Aster elegans var. engelmannii]
                                                   [Aster engelmannii]
                                             Eucephalus glabratus
                                                   [Aster brickellioides var. glabratus]
                                                   [Aster siskiyouensis]
                                             Eucephalus glaucescens
                                                   [Aster engelmannii var. glaucescens]
                                                   [Aster glaucescens]
                                             Eucephalus gormanii
                                                   [Aster gormanii]
                                             Eucephalus ledophyllus
                                                   [Aster engelmannii var. ledophyllus]
                                                   [Aster ledophyllus]
                                               Eucephalus ledophyllus var. covillei
                                                     [Aster covillei]
                                                     [Aster ledophyllus var. covillei]
                                                     [Eucephalus covillei]
                                               Eucephalus ledophyllus var. ledophyllus
                                                     [Aster engelmannii var. ledophyllus]
                                                     [Aster ledophyllus]
                                             Eucephalus paucicapitatus
                                                   [Aster engelmannii var. paucicapitatus]
                                                   [Aster paucicapitatus]
                                             Eucephalus tomentellus
                                                   [Aster brickellioides]
                                                   [Aster tomentellus]
                                                   [Eucephalus brickellioides]
                                                   [Sericocarpus tomentellus]
                                             Eucephalus vialis
                                                   [Aster vialis]
                                     Euchiton
                                             Euchiton gymnocephalus
                                                   [Gnaphalium collinum]
                                                   [Gnaphalium gymnocephalus]
                                             Euchiton involucratus
                                                   [Gnaphalium virgatum]
                                             Euchiton japonicus
                                                   [Gnaphalium japonicum]
                                             Euchiton sphaericus
                                     Eupatorium
                                             Eupatorium album
                                                   [Eupatorium album var. glandulosum]
                                                   [Eupatorium glandulosum]
                                               Eupatorium album var. album
                                                     [Eupatorium album var. glandulosum]
                                                     [Eupatorium fernaldii]
                                                     [Eupatorium glandulosum]
                                             Eupatorium altissimum
                                                   [Eupatorium saltuense]
                                             Eupatorium anomalum
                                             Eupatorium cannabinum
                                             Eupatorium capillifolium
                                             Eupatorium compositifolium
                                             Eupatorium cordigerum
                                                   [Eupatorium rotundifolium var. cordigerum]
                                             Eupatorium godfreyanum
                                             Eupatorium hyssopifolium
                                                   [Eupatorium hyssopifolium var. calcaratum]
                                                   [Eupatorium lecheifolium]
                                               Eupatorium hyssopifolium var. hyssopifolium
                                                     [Eupatorium lecheifolium]
                                                     [Eupatorium torreyanum]
                                               Eupatorium hyssopifolium var. laciniatum
                                                     [Eupatorium torreyanum]
                                             Eupatorium lancifolium
                                                   [Eupatorium semiserratum var. lancifolium]
                                             Eupatorium leptophyllum
                                                   [Eupatorium capillifolium var. leptophyllum]
                                             Eupatorium leucolepis
                                               Eupatorium leucolepis var. leucolepis
                                             Eupatorium linearifolium
                                                   [Eupatorium cuneifolium]
                                                   [Eupatorium glaucescens]
                                                   [Eupatorium tortifolium]
                                             Eupatorium mikanioides
                                             Eupatorium mohrii
                                                   [Eupatorium recurvans]
                                             Eupatorium novae-angliae
                                                   [Eupatorium leucolepis var. novae-angliae]
                                             Eupatorium paludicola
                                             Eupatorium perfoliatum
                                                   [Eupatorium chapmanii]
                                                   [Eupatorium cuneatum]
                                                   [Eupatorium perfoliatum var. colpophilum]
                                               Eupatorium perfoliatum var. perfoliatum
                                             Eupatorium petaloideum
                                             Eupatorium pilosum
                                                   [Eupatorium rotundifolium var. saundersii]
                                                   [Eupatorium verbenifolium]
                                             Eupatorium pinnatifidum
                                                   [Eupatorium eugenei]
                                                   [Eupatorium pectinatum]
                                                   [Eupatorium smithii]
                                             Eupatorium quaternum
                                             Eupatorium resinosum
                                                   [Eupatorium resinosum var. kentuckiense]
                                             Eupatorium rotundifolium
                                               Eupatorium rotundifolium var. ovatum
                                                     [Eupatorium pubescens]
                                                     [Eupatorium rotundifolium subsp. ovatum]
                                               Eupatorium rotundifolium var. rotundifolium
                                                     [Eupatorium verbenifolium]
                                               Eupatorium rotundifolium var. scabridum
                                                     [Eupatorium scabridum]
                                             Eupatorium semiserratum
                                                   [Eupatorium cuneifolium var. semiserratum]
                                             Eupatorium serotinum
                                             Eupatorium sessilifolium
                                                   [Eupatorium sessilifolium var. brittonianum]
                                               Eupatorium sessilifolium var. sessilifolium
                                               Eupatorium sessilifolium var. vaseyi
                                                     [Eupatorium album var. monardifolium]
                                                     [Eupatorium album var. vaseyi]
                                                     [Eupatorium fernaldii]
                                                     [Eupatorium vaseyi]
                                             Eupatorium subvenosum
                                                   [Eupatorium album var. subvenosum]
                                             Eupatorium trifoliatum
                                             Eupatorium triplinerve
                                             Eupatorium truncatum
                                                   [Eupatorium cuneatum]
                                                   [Eupatorium perfoliatum var. cuneatum]
                                                   [Eupatorium perfoliatum var. truncatum]
                                                   [Eupatorium polyneuron]
                                                   [Eupatorium resinosum var. kentuckiense]
                                                   [Eupatorium serotinum var. polyneuron]
                                     Euphrosyne
                                             Euphrosyne acerosa
                                                   [Iva acerosa]
                                                   [Oxytenia acerosa]
                                             Euphrosyne dealbata
                                                   [Iva dealbata]
                                                   [Leuciva dealbata]
                                             Euphrosyne nevadensis
                                                   [Chorisiva nevadensis]
                                                   [Iva nevadensis]
                                     Eurybia
                                             Eurybia avita
                                                   [Aster avitus]
                                             Eurybia chasei
                                                   [Aster chasei]
                                             Eurybia chlorolepis
                                                   [Aster chlorolepis]
                                                   [Aster divaricatus var. chlorolepis]
                                             Eurybia compacta
                                                   [Aster gracilis]
                                             Eurybia conspicua
                                                   [Aster conspicuus]
                                             Eurybia divaricata
                                                   [Aster boykinii]
                                                   [Aster carmesinus]
                                                   [Aster castaneus]
                                                   [Aster claytonii]
                                                   [Aster divaricatus]
                                                   [Aster excavatus]
                                                   [Aster flexilis]
                                                   [Aster stilettiformis]
                                                   [Aster tenebrosus]
                                             Eurybia eryngiifolia
                                                   [Aster eryngiifolius]
                                             Eurybia furcata
                                                   [Aster furcatus]
                                             Eurybia glauca
                                                   [Aster glaucodes var. formosus]
                                                   [Aster glaucodes]
                                                   [Aster glaucus]
                                                   [Eucephalus formosus]
                                                   [Eucephalus glaucus]
                                               Eurybia glauca var. glauca
                                               Eurybia glauca var. pulchra
                                                     [Aster glaucodes subsp. pulcher]
                                                     [Aster glaucodes var. pulcher]
                                                     [Eurybia pulchra]
                                             Eurybia hemispherica
                                                   [Aster gattingeri]
                                                   [Aster hemisphericus]
                                                   [Aster paludosus subsp. hemisphericus]
                                                   [Aster pedionomus]
                                                   [Aster verutifolius]
                                                   [Heleastrum hemisphericum]
                                             Eurybia herveyi
                                                   [Aster herveyi]
                                             Eurybia horrida
                                                   [Aster horridus]
                                                   [Herrickia horrida]
                                             Eurybia integrifolia
                                                   [Aster integrifolius]
                                             Eurybia jonesiae
                                                   [Aster jonesiae]
                                             Eurybia kingii
                                                   [Aster kingii]
                                                   [Machaeranthera kingii]
                                                   [Tonestus kingii var. kingii]
                                                   [Tonestus kingii]
                                               Eurybia kingii var. barnebyana
                                                     [Aster kingii var. barnebyana]
                                                     [Machaeranthera kingii var. barnebyana]
                                                     [Tonestus kingii var. barnebyana]
                                             Eurybia macrophylla
                                                   [Aster ianthinus]
                                                   [Aster macrophyllus var. apricensis]
                                                   [Aster macrophyllus var. excelsior]
                                                   [Aster macrophyllus var. ianthinus]
                                                   [Aster macrophyllus var. pinguifolius]
                                                   [Aster macrophyllus var. sejunctus]
                                                   [Aster macrophyllus var. velutinus]
                                                   [Aster macrophyllus]
                                                   [Aster multiformis]
                                                   [Aster nobilis]
                                                   [Aster polyphyllus]
                                                   [Aster riciniatus]
                                                   [Aster roscidus]
                                                   [Aster violaris]
                                             Eurybia merita
                                                   [Aster behringensis]
                                                   [Aster meritus]
                                                   [Aster richardsonii]
                                                   [Aster sibiricus subsp. richardsonii]
                                                   [Aster sibiricus var. giganteus]
                                                   [Aster sibiricus var. meritus]
                                                   [Eurybia sibirica var. gigantea]
                                             Eurybia mirabilis
                                                   [Aster commixtus]
                                                   [Aster mirabilis]
                                                   [Eurybia commixta]
                                             Eurybia paludosa
                                                   [Aster grandiflorus]
                                                   [Aster paludosus]
                                             Eurybia radula
                                                   [Aster radula var. strictus]
                                                   [Aster radula]
                                                   [Aster strictus]
                                             Eurybia radulina
                                                   [Aster eliasii]
                                                   [Aster radulinus]
                                                   [Weberaster radulinus]
                                             Eurybia saxicastellii
                                                   [Aster saxicastellii]
                                             Eurybia schreberi
                                                   [Aster chasei]
                                                   [Aster curvescens]
                                                   [Aster glomeratus]
                                                   [Aster schreberi]
                                                   [Eurybia glomerata]
                                             Eurybia sibirica
                                                   [Aster sibiricus]
                                                   [Aster subintegerrimus]
                                               Eurybia sibirica subsp. sibirica
                                                     [Aster pauciflorus]
                                                     [Aster richardsonii]
                                                     [Aster sibiricus subsp. richardsonii]
                                                     [Aster sibiricus var. giganteus]
                                                     [Aster sibiricus]
                                                     [Eurybia sibirica var. gigantea]
                                               Eurybia sibirica subsp. subintegerrima
                                                     [Aster subintegerrimus]
                                             Eurybia spectabilis
                                                   [Aster bellidiflorus]
                                                   [Aster commixtus]
                                                   [Aster smallii]
                                                   [Aster spectabilis var. cinerascens]
                                                   [Aster spectabilis var. suffultus]
                                                   [Aster spectabilis]
                                                   [Eurybia commixta]
                                             Eurybia spinulosa
                                                   [Aster spinulosus]
                                             Eurybia surculosa
                                                   [Aster surculosus]
                                             Eurybia wasatchensis
                                                   [Aster glaucus var. wasatchensis]
                                                   [Aster wasatchensis]
                                     Euryops
                                             Euryops chrysanthemoides
                                             Euryops multifidus
                                             Euryops subcarnosus
                                               Euryops subcarnosus subsp. vulgaris
                                     Eurystemon
                                     Euthamia
                                             Euthamia caroliniana
                                                   [Euthamia galetorum]
                                                   [Euthamia graminifolia var. galetorum]
                                                   [Euthamia media]
                                                   [Euthamia microcephala]
                                                   [Euthamia microphylla]
                                                   [Euthamia minor]
                                                   [Euthamia remota]
                                                   [Euthamia tenuifolia var. pycnocephala]
                                                   [Euthamia tenuifolia var. tenuifolia]
                                                   [Euthamia tenuifolia]
                                                   [Solidago caroliniana]
                                                   [Solidago galetorum]
                                                   [Solidago graminifolia var. galetorum]
                                                   [Solidago graminifolia var. media]
                                                   [Solidago media]
                                                   [Solidago microcephala]
                                                   [Solidago microphylla]
                                                   [Solidago minor]
                                                   [Solidago moseleyi]
                                                   [Solidago remota]
                                                   [Solidago tenuifolia var. pycnocephala]
                                                   [Solidago tenuifolia]
                                             Euthamia graminifolia
                                                   [Chrysocoma graminifolia]
                                                   [Euthamia floribunda]
                                                   [Euthamia graminifolia var. hirtipes]
                                                   [Euthamia graminifolia var. major]
                                                   [Euthamia graminifolia var. nuttallii]
                                                   [Euthamia hirtipes]
                                                   [Euthamia nuttallii]
                                                   [Solidago graminifolia var. major]
                                                   [Solidago graminifolia var. nuttallii]
                                                   [Solidago graminifolia var. polycephala]
                                                   [Solidago graminifolia]
                                                   [Solidago hirtella]
                                                   [Solidago nuttallii]
                                                   [Solidago polycephala]
                                               Euthamia graminifolia var. graminifolia
                                                     [Chrysocoma graminifolia]
                                                     [Euthamia floribunda]
                                                     [Euthamia graminifolia var. major]
                                                     [Euthamia graminifolia var. nuttallii]
                                                     [Euthamia nuttallii]
                                                     [Solidago graminifolia var. major]
                                                     [Solidago graminifolia var. nuttallii]
                                                     [Solidago graminifolia var. polycephala]
                                                     [Solidago graminifolia]
                                                     [Solidago hirtella]
                                                     [Solidago nuttallii]
                                                     [Solidago polycephala]
                                             Euthamia gymnospermoides
                                                   [Euthamia camporum]
                                                   [Euthamia chrysothamnoides]
                                                   [Euthamia glutinosa]
                                                   [Euthamia media]
                                                   [Euthamia pulverulenta]
                                                   [Euthamia remota]
                                                   [Solidago camporum]
                                                   [Solidago chrysothamnoides]
                                                   [Solidago graminifolia var. gymnospermoides]
                                                   [Solidago graminifolia var. media]
                                                   [Solidago gymnospermoides var. callosa]
                                                   [Solidago gymnospermoides]
                                                   [Solidago media]
                                                   [Solidago moseleyi]
                                                   [Solidago perglabra]
                                                   [Solidago remota]
                                                   [Solidago texensis]
                                             Euthamia leptocephala
                                                   [Solidago leptocephala]
                                             Euthamia occidentalis
                                                   [Euthamia californica]
                                                   [Euthamia linearifolia]
                                                   [Solidago occidentalis]
                                     Eutrochium
                                             Eutrochium dubium
                                                   [Eupatoriadelphus dubius]
                                                   [Eupatorium dubium]
                                             Eutrochium fistulosum
                                                   [Eupatoriadelphus fistulosus]
                                                   [Eupatorium fistulosum]
                                             Eutrochium maculatum
                                                   [Eupatoriadelphus maculatus var. maculatus]
                                                   [Eupatoriadelphus maculatus]
                                                   [Eupatorium maculatum var. maculatum]
                                                   [Eupatorium maculatum]
                                                   [Eupatorium purpureum var. maculatum]
                                               Eutrochium maculatum var. bruneri
                                                     [Eupatoriadelphus maculatus var. bruneri]
                                                     [Eupatorium bruneri]
                                                     [Eupatorium maculatum subsp. bruneri]
                                                     [Eupatorium maculatum var. bruneri]
                                               Eutrochium maculatum var. foliosum
                                                     [Eupatoriadelphus maculatus var. foliosum]
                                                     [Eupatorium maculatum var. foliosum]
                                                     [Eupatorium purpureum var. foliosum]
                                                     [Eupatorium trifoliatum var. foliosum]
                                               Eutrochium maculatum var. maculatum
                                                     [Eupatoriadelphus maculatus var. maculatus]
                                                     [Eupatorium maculatum var. maculatum]
                                             Eutrochium purpureum
                                                   [Eupatoriadelphus purpureus]
                                                   [Eupatorium falcatum]
                                                   [Eupatorium purpureum var. amoenum]
                                                   [Eupatorium purpureum var. purpureum]
                                                   [Eupatorium purpureum]
                                               Eutrochium purpureum var. carolinianum
                                               Eutrochium purpureum var. holzingeri
                                                     [Eupatorium holzingeri]
                                                     [Eupatorium purpureum var. holzingeri]
                                               Eutrochium purpureum var. purpureum
                                                     [Eupatoriadelphus purpureus]
                                                     [Eupatorium falcatum]
                                                     [Eupatorium purpureum var. amoenum]
                                                     [Eupatorium purpureum var. purpureum]
                                             Eutrochium steelei
                                                   [Eupatoriadelphus steelei]
                                                   [Eupatorium steelei]
                                     Evax
                                     Facelis
                                             Facelis retusa
                                                   [Facelis apiculata]
                                               Facelis retusa subsp. retusa
                                                     [Facelis apiculata]
                                     Felicia
                                             Felicia amoena
                                               Felicia amoena subsp. stricta
                                             Felicia hyssopifolia
                                               Felicia hyssopifolia subsp. hyssopifolia
                                                     [Aster villosus]
                                             Felicia linifolia
                                                   [Aster venustus]
                                     Filago
                                             Filago anatolica
                                             Filago germanica
                                               Filago germanica germanica
                                             Filago minima
                                             Filago prolifera
                                             Filago pyramidata
                                               Filago pyramidata var. pyramidata
                                             Filago vulgaris
                                                   [Gifola germanica]
                                                   [Gnaphalium germanicum]
                                     Fitchia
                                             Fitchia speciosa
                                     Flaveria
                                             Flaveria bidentis
                                             Flaveria brownii
                                             Flaveria campestris
                                             Flaveria chlorifolia
                                             Flaveria floridana
                                             Flaveria latifolia
                                             Flaveria linearis
                                             Flaveria macdougalii
                                             Flaveria oppositifolia
                                             Flaveria trinervia
                                                   [Oedera trinervia]
                                     Fleischmannia
                                             Fleischmannia incarnata
                                                   [Eupatorium incarnatum]
                                             Fleischmannia microstemon
                                                   [Eupatorium microstemon]
                                             Fleischmannia pycnocephala
                                                   [Eupatorium pycnocephalum]
                                             Fleischmannia sonorae
                                                   [Eupatorium sonorae]
                                     Florestina
                                             Florestina tripteris
                                                   [Palafoxia tripteris var. brevis]
                                                   [Palafoxia tripteris]
                                     Flourensia
                                             Flourensia cernua
                                             Flourensia pringlei
                                                   [Helianthella pringlei]
                                     Flyriella
                                             Flyriella parryi
                                                   [Brickellia shineri]
                                                   [Eupatorium parryi]
                                     Gaillardia
                                             Gaillardia aestivalis
                                                   [Gaillardia aestivalis var. flavovirens]
                                                   [Gaillardia aestivalis var. winkleri]
                                                   [Gaillardia chrysantha]
                                                   [Gaillardia fastigiata]
                                                   [Gaillardia lanceolata var. fastigiata]
                                                   [Gaillardia lanceolata var. flavovirens]
                                                   [Gaillardia lanceolata]
                                                   [Gaillardia lutea var. winkleri]
                                                   [Gaillardia lutea]
                                                   [Gaillardia rigida]
                                                   [Gaillardia serotina]
                                               Gaillardia aestivalis var. aestivalis
                                                     [Gaillardia chrysantha]
                                                     [Gaillardia fastigiata]
                                                     [Gaillardia lanceolata var. fastigiata]
                                                     [Gaillardia lanceolata]
                                                     [Gaillardia rigida]
                                                     [Gaillardia serotina]
                                             Gaillardia amblyodon
                                             Gaillardia aristata
                                             Gaillardia arizonica
                                                   [Gaillardia arizonica var. pringlei]
                                                   [Gaillardia pringlei]
                                               Gaillardia arizonica var. arizonica
                                             Gaillardia coahuilensis
                                             Gaillardia grandiflora
                                             Gaillardia megapotamica
                                             Gaillardia mexicana
                                             Gaillardia multiceps
                                                   [Gaillardia multiceps var. microcephala]
                                               Gaillardia multiceps var. multiceps
                                             Gaillardia parryi
                                             Gaillardia pinnatifida
                                                   [Gaillardia flava]
                                                   [Gaillardia gracilis]
                                                   [Gaillardia mearnsii]
                                                   [Gaillardia pinnatifida var. linearis]
                                               Gaillardia pinnatifida var. pinnatifida
                                                     [Gaillardia gracilis]
                                                     [Gaillardia mearnsii]
                                             Gaillardia pulchella
                                                   [Gaillardia drummondii]
                                                   [Gaillardia neomexicana]
                                                   [Gaillardia picta]
                                                   [Gaillardia pulchella var. australis]
                                                   [Gaillardia pulchella var. picta]
                                                   [Gaillardia villosa]
                                               Gaillardia pulchella var. pulchella
                                                     [Gaillardia drummondii]
                                                     [Gaillardia neomexicana]
                                                     [Gaillardia villosa]
                                             Gaillardia spathulata
                                             Gaillardia suavis
                                                   [Agassizia suavis]
                                                   [Gaillardia trinervata]
                                     Galinsoga
                                             Galinsoga parviflora
                                                   [Galinsoga semicalva var. percalva]
                                                   [Galinsoga semicalva]
                                               Galinsoga parviflora var. parviflora
                                               Galinsoga parviflora var. semicalva
                                                     [Galinsoga semicalva]
                                             Galinsoga quadriradiata
                                                   [Galinsoga aristulata]
                                                   [Galinsoga bicolorata]
                                                   [Galinsoga caracasana]
                                                   [Galinsoga ciliata]
                                                   [Galinsoga urticifolia]
                                     Gamochaeta
                                             Gamochaeta aliena
                                                   [Gnaphalium alienum]
                                             Gamochaeta argyrinea
                                             Gamochaeta calviceps
                                                   [Gnaphalium calviceps]
                                             Gamochaeta chionesthes
                                             Gamochaeta coarctata
                                                   [Gamochaeta spicata]
                                                   [Gnaphalium spicatum]
                                             Gamochaeta falcata
                                                   [Gnaphalium calviceps]
                                                   [Gnaphalium falcatum]
                                                   [Gnaphalium purpureum var. falcatum]
                                             Gamochaeta pensylvanica
                                                   [Gnaphalium pensylvanicum]
                                                   [Gnaphalium peregrinum]
                                                   [Gnaphalium purpureum var. spathulatum]
                                                   [Gnaphalium spathulatum]
                                             Gamochaeta purpurea
                                                   [Gamochaeta americana]
                                                   [Gnaphalium americanum]
                                                   [Gnaphalium obtusifolium]
                                                   [Gnaphalium purpureum var. americanum]
                                                   [Gnaphalium purpureum]
                                             Gamochaeta simplicicaulis
                                             Gamochaeta sphacilata
                                                   [Gnaphalium sphacilatum]
                                             Gamochaeta ustulata
                                                   [Gnaphalium purpureum var. ustulatum]
                                                   [Gnaphalium ustulatum]
                                     Garberia
                                             Garberia heterophylla
                                                   [Garberia fruticosa]
                                     Gazania
                                             Gazania linearis
                                                   [Gazania longiscapa]
                                                   [Gorteria linearis]
                                     Geraea
                                             Geraea canescens
                                                   [Geraea canescens var. paniculata]
                                               Geraea canescens var. canescens
                                             Geraea viscida
                                     Gerbera
                                             Gerbera jamesonii
                                     Geropogon
                                             Geropogon hybridus
                                                   [Tragopogon hybridus]
                                     Glebionis
                                             Glebionis carinata
                                                   [Chrysanthemum carinatum]
                                                   [Ismelia carinata]
                                             Glebionis carinatum
                                                   [Chrysanthemum carinatum]
                                                   [Ismelia carinata]
                                             Glebionis coronaria
                                                   [Chrysanthemum coronarium var. coronarium]
                                                   [Chrysanthemum coronarium]
                                                   [Chrysanthemum segetum]
                                                   [Glebionis coronarium]
                                             Glebionis segetum
                                                   [Chrysanthemum coronarium var. spatiosum]
                                                   [Chrysanthemum segetum]
                                     Glyptopleura
                                             Glyptopleura marginata
                                             Glyptopleura setulosa
                                     Gnaphalium
                                             Gnaphalium exilifolium
                                                   [Gnaphalium grayi]
                                             Gnaphalium palustre
                                                   [Filaginella palustris]
                                             Gnaphalium polycaulon
                                                   [Gnaphalium indicum]
                                             Gnaphalium uliginosum
                                                   [Filaginella uliginosa]
                                     Gochnatia
                                     Godetia
                                     Gorteria
                                     Grindelia
                                             Grindelia adenodonta
                                                   [Grindelia microcephala var. adenodonta]
                                             Grindelia arizonica
                                                   [Grindelia arizonica var. dentata]
                                                   [Grindelia arizonica var. microphylla]
                                                   [Grindelia arizonica var. neomexicana]
                                                   [Grindelia arizonica var. stenophylla]
                                                   [Grindelia laciniata]
                                                   [Grindelia neomexicana]
                                                   [Grindelia scabra var. neomexicana]
                                               Grindelia arizonica var. arizonica
                                                     [Grindelia arizonica var. dentata]
                                                     [Grindelia arizonica var. microphylla]
                                             Grindelia ciliata
                                                   [Grindelia papposa]
                                                   [Haplopappus ciliatus]
                                                   [Prionopsis ciliata]
                                             Grindelia columbiana
                                                   [Grindelia nana subsp. columbiana]
                                                   [Grindelia nana var. discoidea]
                                             Grindelia decumbens
                                               Grindelia decumbens var. decumbens
                                             Grindelia fraxinipratensis
                                                   [Grindelia fraxinopratensis]
                                             Grindelia grandiflora
                                             Grindelia havardii
                                             Grindelia hirsutula
                                                   [Grindelia acutifolia]
                                                   [Grindelia arenicola]
                                                   [Grindelia camporum var. bracteosa]
                                                   [Grindelia camporum var. camporum]
                                                   [Grindelia camporum var. parviflora]
                                                   [Grindelia camporum]
                                                   [Grindelia fastigiata]
                                                   [Grindelia hallii]
                                                   [Grindelia hirsutula subsp. rubricaulis]
                                                   [Grindelia hirsutula var. davyi]
                                                   [Grindelia hirsutula var. hallii]
                                                   [Grindelia hirsutula var. maritima]
                                                   [Grindelia humilis]
                                                   [Grindelia inornata var. angusta]
                                                   [Grindelia inornata var. inornata]
                                                   [Grindelia inornata]
                                                   [Grindelia integrifolia var. macrophylla]
                                                   [Grindelia latifolia subsp. platyphylla]
                                                   [Grindelia latifolia]
                                                   [Grindelia maritima]
                                                   [Grindelia nana subsp. columbiana]
                                                   [Grindelia nana var. integerrima]
                                                   [Grindelia nana var. nana]
                                                   [Grindelia nana]
                                                   [Grindelia paludosa]
                                                   [Grindelia perennis]
                                                   [Grindelia procera]
                                                   [Grindelia revoluta]
                                                   [Grindelia robusta var. angustifolia]
                                                   [Grindelia robusta var. bracteosa]
                                                   [Grindelia robusta]
                                                   [Grindelia squarrosa var. quasiperennis]
                                                   [Grindelia stricta subsp. blakei]
                                                   [Grindelia stricta subsp. venulosa]
                                                   [Grindelia stricta var. angustifolia]
                                                   [Grindelia stricta var. platyphylla]
                                                   [Grindelia stricta var. stricta]
                                                   [Grindelia stricta]
                                               Grindelia hirsutula var. hirsutula
                                                     [Grindelia hirsutula subsp. rubricaulis]
                                                     [Grindelia humilis]
                                             Grindelia howellii
                                             Grindelia integrifolia
                                             Grindelia inuloides
                                                   [Aster spathulatus]
                                             Grindelia lanceolata
                                                   [Grindelia littoralis]
                                                   [Grindelia texana var. lanceolata]
                                               Grindelia lanceolata var. lanceolata
                                                     [Grindelia littoralis]
                                                     [Grindelia texana var. lanceolata]
                                               Grindelia lanceolata var. subincisa
                                                     [Grindelia decumbens var. subincisa]
                                               Grindelia lanceolata var. texana
                                                     [Grindelia texana]
                                             Grindelia microcephala
                                             Grindelia oolepis
                                             Grindelia oxylepis
                                             Grindelia pusilla
                                                   [Grindelia microcephala var. pusilla]
                                             Grindelia scabra
                                             Grindelia squarrosa
                                                   [Grindelia aphanactis]
                                                   [Grindelia nana var. integrifolia]
                                                   [Grindelia nuda var. aphanactis]
                                                   [Grindelia nuda var. nuda]
                                                   [Grindelia nuda]
                                                   [Grindelia serrulata]
                                                   [Grindelia squarrosa var. integrifolia]
                                                   [Grindelia squarrosa var. nuda]
                                                   [Grindelia squarrosa var. serrulata]
                                                   [Grindelia texana]
                                               Grindelia squarrosa var. squarrosa
                                             Grindelia subalpina
                                                   [Grindelia subalpina var. erecta]
                                               Grindelia subalpina var. subalpina
                                     Grossularia
                                     Guardiola
                                             Guardiola platyphylla
                                     Guizotia
                                             Guizotia abyssinica
                                     Gundlachia
                                             Gundlachia corymbosa
                                             Gundlachia diffusa
                                             Gundlachia triantha
                                                   [Ericameria triantha]
                                                   [Haplopappus trianthus]
                                                   [Xylothamia triantha]
                                     Gutierrezia
                                             Gutierrezia arizonica
                                                   [Greenella arizonica]
                                                   [Xanthocephalum arizonicum]
                                             Gutierrezia californica
                                                   [Gutierrezia bracteata]
                                                   [Gutierrezia linearifolia]
                                             Gutierrezia elegans
                                             Gutierrezia microcephala
                                                   [Brachyris microcephala]
                                                   [Gutierrezia glomerella]
                                                   [Gutierrezia linoides]
                                                   [Gutierrezia lucida]
                                                   [Gutierrezia sarothrae var. microcephala]
                                                   [Xanthocephalum lucidum]
                                                   [Xanthocephalum microcephalum]
                                             Gutierrezia petradoria
                                                   [Xanthocephalum petradoria]
                                             Gutierrezia pomariensis
                                                   [Gutierrezia sarothrae var. pomariensis]
                                                   [Xanthocephalum sarothrae var. pomariense]
                                             Gutierrezia sarothrae
                                                   [Gutierrezia diversifolia]
                                                   [Gutierrezia lepidota]
                                                   [Gutierrezia linearifolia]
                                                   [Gutierrezia linearis]
                                                   [Gutierrezia linoides]
                                                   [Gutierrezia longipappa]
                                                   [Gutierrezia sarothrae var. pomariensis]
                                                   [Gutierrezia tenuis]
                                                   [Solidago sarothrae]
                                                   [Xanthocephalum sarothrae var. pomariense]
                                                   [Xanthocephalum sarothrae]
                                                   [Xanthocephalum tenue]
                                             Gutierrezia serotina
                                                   [Gutierrezia polyantha]
                                             Gutierrezia sphaerocephala
                                                   [Gutierrezia eriocarpa]
                                                   [Xanthocephalum sphaerocephalum var. eriocarpum]
                                                   [Xanthocephalum sphaerocephalum]
                                             Gutierrezia texana
                                                   [Brachyris microcephala]
                                                   [Hemiachyris texana]
                                                   [Xanthocephalum texanum]
                                               Gutierrezia texana var. glutinosa
                                                     [Gutierrezia glutinosa]
                                                     [Hemiachyris glutinosa]
                                               Gutierrezia texana var. texana
                                                     [Hemiachyris texana]
                                                     [Xanthocephalum texanum]
                                             Gutierrezia wrightii
                                                   [Greenella discoidea]
                                                   [Xanthocephalum wrightii]
                                     Gymnosperma
                                             Gymnosperma glutinosum
                                                   [Selloa glutinosa]
                                                   [Xanthocephalum glutinosum]
                                     Gymnostyles
                                     Gynura
                                             Gynura aurantiaca
                                     Haplocarpha
                                             Haplocarpha lyrata
                                     Haploesthes
                                             Haploesthes greggii
                                               Haploesthes greggii var. texana
                                     Haplopappus
                                             Haplopappus acaulis
                                             Haplopappus angustifolius
                                               Haplopappus angustifolius subsp. saxatilis
                                                     [Aster saxatilis]
                                             Haplopappus chrysanthemifolius
                                             Haplopappus schumannii
                                                   [Haplopappus armerioides]
                                             Haplopappus scopulorum
                                             Haplopappus spinulosus
                                               Haplopappus spinulosus var. glaberrimus
                                             Haplopappus velutinus
                                               Haplopappus velutinus subsp. velutinus
                                                     [Haplopappus stenophyllus]
                                             Haplopappus venetus
                                               Haplopappus venetus subsp. vernonioides
                                     Harmonia
                                             Harmonia doris-nilesiae
                                                   [Madia doris-nilesiae]
                                             Harmonia guggolziorum
                                             Harmonia hallii
                                                   [Madia hallii]
                                             Harmonia nutans
                                                   [Madia nutans]
                                             Harmonia stebbinsii
                                                   [Madia stebbinsii]
                                     Hartwrightia
                                             Hartwrightia floridana
                                     Hasseanthus
                                     Hasteola
                                             Hasteola robertiorum
                                             Hasteola suaveolens
                                                   [Cacalia suaveolens]
                                                   [Senecio suaveolens]
                                                   [Synosma suaveolens]
                                     Hazardia
                                             Hazardia brickellioides
                                                   [Haplopappus brickellioides]
                                             Hazardia cana
                                                   [Haplopappus canus]
                                             Hazardia detonsa
                                                   [Haplopappus detonsus]
                                             Hazardia orcuttii
                                             Hazardia squarrosa
                                                   [Haplopappus squarrosus]
                                               Hazardia squarrosa var. grindelioides
                                                     [Haplopappus squarrosus subsp. grindelioides]
                                               Hazardia squarrosa var. obtusa
                                                     [Haplopappus squarrosus subsp. obtusus]
                                               Hazardia squarrosa var. squarrosa
                                                     [Haplopappus squarrosus]
                                             Hazardia stenolepis
                                                   [Haplopappus squarrosus subsp. stenolepis]
                                             Hazardia whitneyi
                                                   [Haplopappus whitneyi]
                                               Hazardia whitneyi var. discoidea
                                                     [Haplopappus whitneyi subsp. discoideus]
                                               Hazardia whitneyi var. whitneyi
                                                     [Haplopappus whitneyi]
                                     Hebeclinium
                                             Hebeclinium macrophyllum
                                                   [Eupatorium macrophyllum]
                                     Hecastocleis
                                             Hecastocleis shockleyi
                                     Hecatonia
                                     Hedosyne
                                             Hedosyne ambrosiifolia
                                                   [Iva ambrosiifolia subsp. lobata]
                                                   [Iva ambrosiifolia]
                                               Hedosyne ambrosiifolia var. lobata
                                                     [Iva ambrosiifolia var. lobata]
                                     Hedypnois
                                             Hedypnois rhagadioloides
                                               Hedypnois rhagadioloides subsp. rhagadioloides
                                                     [Hedypnois cretica]
                                     Helenium
                                             Helenium amarum
                                                   [Helenium tenuifolium]
                                               Helenium amarum var. amarum
                                                     [Helenium tenuifolium]
                                               Helenium amarum var. badium
                                                     [Helenium badium]
                                                     [Helenium tenuifolium var. badium]
                                             Helenium arizonicum
                                             Helenium autumnale
                                                   [Helenium autumnale var. canaliculatum]
                                                   [Helenium autumnale var. montanum]
                                                   [Helenium autumnale var. parviflorum]
                                                   [Helenium canaliculatum]
                                                   [Helenium latifolium]
                                                   [Helenium macranthum]
                                                   [Helenium montanum]
                                                   [Helenium parviflorum]
                                               Helenium autumnale var. autumnale
                                                     [Helenium autumnale var. canaliculatum]
                                                     [Helenium autumnale var. parviflorum]
                                                     [Helenium canaliculatum]
                                                     [Helenium latifolium]
                                                     [Helenium parviflorum]
                                               Helenium autumnale var. grandiflorum
                                                     [Helenium macranthum]
                                             Helenium bigelovii
                                                   [Helenium rivulare]
                                             Helenium bolanderi
                                                   [Dugaldia grandiflora]
                                                   [Helenium bigelovii var. festivum]
                                             Helenium brevifolium
                                                   [Helenium curtisii]
                                             Helenium campestre
                                             Helenium drummondii
                                                   [Helenium fimbriatum]
                                                   [Leptopoda fimbriata]
                                             Helenium elegans
                                               Helenium elegans var. amphilobum
                                                     [Helenium amphilobum]
                                               Helenium elegans var. elegans
                                             Helenium flexuosum
                                                   [Helenium floridanum]
                                                   [Helenium godfreyi]
                                                   [Helenium nudiflorum]
                                             Helenium incisum
                                             Helenium linifolium
                                             Helenium microcephalum
                                               Helenium microcephalum var. microcephalum
                                               Helenium microcephalum var. ooclinium
                                                     [Helenium ooclinium]
                                             Helenium pinnatifidum
                                             Helenium polyphyllum
                                             Helenium puberulum
                                                   [Helenium decurrens]
                                             Helenium quadridentatum
                                             Helenium thurberi
                                             Helenium vernale
                                                   [Helenium decurrens]
                                                   [Helenium helenium]
                                                   [Helenium nuttallii]
                                             Helenium virginicum
                                     Heleochloa
                                     Helianthella
                                             Helianthella californica
                                               Helianthella californica subsp. californica
                                               Helianthella californica subsp. nevadensis
                                                     [Helianthella californica var. nevadensis]
                                               Helianthella californica subsp. shastensis
                                                     [Helianthella californica var. shastensis]
                                               Helianthella californica var. californica
                                             Helianthella castanea
                                             Helianthella microcephala
                                                   [Encelia microcephala]
                                             Helianthella parryi
                                             Helianthella quinquenervis
                                                   [Helianthus quinquenervis]
                                             Helianthella uniflora
                                                   [Helianthella uniflora var. douglasii]
                                                   [Helianthus uniflorus]
                                               Helianthella uniflora var. uniflora
                                                     [Helianthus uniflorus]
                                     Helianthus
                                             Helianthus agrestis
                                             Helianthus ambiguus
                                             Helianthus angustifolius
                                                   [Helianthus angustifolius var. planifolius]
                                             Helianthus annuus
                                                   [Helianthus annuus subsp. jaegeri]
                                                   [Helianthus annuus subsp. lenticularis]
                                                   [Helianthus annuus subsp. texanus]
                                                   [Helianthus annuus var. lenticularis]
                                                   [Helianthus annuus var. macrocarpus]
                                                   [Helianthus annuus var. texanus]
                                                   [Helianthus aridus]
                                                   [Helianthus lenticularis]
                                             Helianthus anomalus
                                             Helianthus argophyllus
                                             Helianthus arizonensis
                                             Helianthus atrorubens
                                                   [Helianthus atrorubens var. alsodes]
                                             Helianthus bolanderi
                                             Helianthus brevifolius
                                             Helianthus californicus
                                             Helianthus carnosus
                                             Helianthus ciliaris
                                             Helianthus cinereus
                                                   [Helianthus cinereus var. sullivantii]
                                             Helianthus cusickii
                                             Helianthus debilis
                                               Helianthus debilis subsp. cucumerifolius
                                                     [Helianthus cucumerifolius]
                                                     [Helianthus debilis var. cucumerifolius]
                                               Helianthus debilis subsp. debilis
                                               Helianthus debilis subsp. silvestris
                                                     [Helianthus debilis var. silvestris]
                                               Helianthus debilis subsp. tardiflorus
                                                     [Helianthus debilis var. tardiflorus]
                                               Helianthus debilis subsp. vestitus
                                                     [Helianthus debilis var. vestitus]
                                                     [Helianthus vestitus]
                                             Helianthus decapetalus
                                                   [Helianthus scrophulariifolius]
                                                   [Helianthus tracheliifolius]
                                             Helianthus deserticola
                                             Helianthus divaricatus
                                                   [Helianthus divaricatus var. angustifolius]
                                             Helianthus divariserratus
                                             Helianthus doronicoides
                                                   [Helianthus pilosus]
                                             Helianthus eggertii
                                             Helianthus exilis
                                             Helianthus filiformis
                                             Helianthus floridanus
                                             Helianthus giganteus
                                                   [Helianthus alienus]
                                                   [Helianthus borealis]
                                                   [Helianthus giganteus subsp. alienus]
                                                   [Helianthus giganteus var. subtuberosus]
                                                   [Helianthus nuttallii var. subtuberosus]
                                                   [Helianthus subtuberosus]
                                                   [Helianthus validus]
                                             Helianthus glaucophyllus
                                             Helianthus glaucus
                                             Helianthus gracilentus
                                             Helianthus grosseserratus
                                                   [Helianthus grosseserratus subsp. maximus]
                                                   [Helianthus grosseserratus var. hypoleucus]
                                                   [Helianthus instabilis]
                                             Helianthus heterophyllus
                                             Helianthus hirsutus
                                                   [Helianthus hirsutus var. stenophyllus]
                                                   [Helianthus hirsutus var. trachyphyllus]
                                                   [Helianthus stenophyllus]
                                             Helianthus intermedius
                                             Helianthus kellermanii
                                             Helianthus laciniatus
                                                   [Helianthus crenatus]
                                                   [Helianthus heiseri]
                                             Helianthus laetiflorus
                                                   [Helianthus scaberrimus]
                                             Helianthus laevigatus
                                                   [Helianthus reindutus]
                                             Helianthus longifolius
                                             Helianthus luxurians
                                             Helianthus maximiliani
                                                   [Helianthus dalyi]
                                             Helianthus microcephalus
                                                   [Helianthus tracheliifolius]
                                             Helianthus mollis
                                                   [Helianthus mollis var. cordatus]
                                             Helianthus multiflorus
                                             Helianthus neglectus
                                             Helianthus niveus
                                               Helianthus niveus subsp. tephrodes
                                                     [Helianthus tephrodes]
                                             Helianthus nuttallii
                                               Helianthus nuttallii subsp. nuttallii
                                                     [Helianthus fascicularis]
                                                     [Helianthus nuttallii subsp. canadensis]
                                                     [Helianthus nuttallii subsp. coloradensis]
                                               Helianthus nuttallii subsp. parishii
                                                     [Helianthus parishii]
                                               Helianthus nuttallii subsp. rydbergii
                                                     [Helianthus nuttallii var. rydbergii]
                                                     [Helianthus rydbergii]
                                             Helianthus occidentalis
                                               Helianthus occidentalis subsp. occidentalis
                                                     [Helianthus dowellianus]
                                                     [Helianthus occidentalis var. dowellianus]
                                               Helianthus occidentalis subsp. plantagineus
                                                     [Helianthus occidentalis var. plantagineus]
                                             Helianthus orgyaloides
                                             Helianthus paradoxus
                                             Helianthus pauciflorus
                                               Helianthus pauciflorus subsp. pauciflorus
                                                     [Helianthus laetiflorus f. rigidus]
                                                     [Helianthus laetiflorus var. rigidus]
                                               Helianthus pauciflorus subsp. subrhomboideus
                                                     [Helianthus laetiflorus var. subrhomboideus]
                                                     [Helianthus pauciflorus var. subrhomboideus]
                                                     [Helianthus rigidus subsp. laetiflorus]
                                                     [Helianthus rigidus subsp. subrhomboideus]
                                                     [Helianthus subrhomboideus]
                                             Helianthus petiolaris
                                               Helianthus petiolaris subsp. fallax
                                               Helianthus petiolaris subsp. petiolaris
                                               Helianthus petiolaris var. canescens
                                                     [Helianthus canescens]
                                                     [Helianthus canus]
                                                     [Helianthus niveus subsp. canescens]
                                               Helianthus petiolaris var. fallax
                                               Helianthus petiolaris var. petiolaris
                                             Helianthus porteri
                                                   [Heliomeris porteri]
                                                   [Viguiera porteri]
                                             Helianthus praecox
                                               Helianthus praecox subsp. praecox
                                                     [Helianthus debilis subsp. praecox]
                                               Helianthus praecox subsp. runyonii
                                                     [Helianthus debilis subsp. runyonii]
                                                     [Helianthus praecox var. runyonii]
                                               Helianthus praecox var. hirtus
                                                     [Helianthus debilis subsp. hirtus]
                                                     [Helianthus praecox subsp. hirtus]
                                             Helianthus praetermissus
                                             Helianthus pumilus
                                             Helianthus radula
                                             Helianthus resinosus
                                                   [Helianthus tomentosus]
                                             Helianthus rigidus
                                               Helianthus rigidus var. subrhomboideus
                                             Helianthus salicifolius
                                                   [Helianthus orgyalis]
                                             Helianthus schweinitzii
                                             Helianthus silphioides
                                                   [Helianthus atrorubens var. pubescens]
                                             Helianthus simulans
                                             Helianthus smithii
                                             Helianthus strumosus
                                                   [Helianthus montanus]
                                                   [Helianthus saxicola]
                                             Helianthus tuberosus
                                                   [Helianthus tomentosus]
                                                   [Helianthus tuberosus var. subcanescens]
                                             Helianthus verticillatus
                                     Helichrysum
                                             Helichrysum foetidum
                                             Helichrysum indicum
                                                   [Gnaphalium indicum]
                                             Helichrysum luteoalbum
                                                   [Gnaphalium luteoalbum]
                                                   [Pseudognaphalium luteoalbum]
                                             Helichrysum petiolare
                                                   [Helichrysum petiolatum]
                                     Heliomeris
                                             Heliomeris hispida
                                                   [Gymnolomia hispida var. ciliata]
                                                   [Gymnolomia hispida]
                                                   [Viguiera ciliata]
                                             Heliomeris longifolia
                                                   [Gymnolomia longifolia]
                                                   [Viguiera longifolia]
                                               Heliomeris longifolia var. annua
                                                     [Heliomeris annua]
                                                     [Viguiera annua]
                                                     [Viguiera longifolia var. annua]
                                               Heliomeris longifolia var. longifolia
                                                     [Gymnolomia longifolia]
                                                     [Viguiera longifolia]
                                             Heliomeris multiflora
                                                   [Heliomeris multiflora var. macrocephala]
                                                   [Viguiera multiflora var. macrocephala]
                                                   [Viguiera multiflora]
                                               Heliomeris multiflora var. brevifolia
                                                     [Viguiera ovalis]
                                               Heliomeris multiflora var. multiflora
                                                     [Viguiera multiflora]
                                               Heliomeris multiflora var. nevadensis
                                                     [Viguiera multiflora var. nevadensis]
                                             Heliomeris soliceps
                                                   [Viguiera soliceps]
                                     Heliopsis
                                             Heliopsis gracilis
                                                   [Heliopsis helianthoides var. gracilis]
                                                   [Heliopsis minor]
                                             Heliopsis helianthoides
                                                   [Heliopsis helianthoides var. solidaginoides]
                                               Heliopsis helianthoides var. helianthoides
                                                     [Heliopsis helianthoides var. solidaginoides]
                                               Heliopsis helianthoides var. scabra
                                                     [Heliopsis helianthoides subsp. occidentalis]
                                                     [Heliopsis helianthoides subsp. scabra]
                                                     [Heliopsis helianthoides var. occidentalis]
                                                     [Heliopsis minor]
                                                     [Heliopsis scabra]
                                             Heliopsis parvifolia
                                     Helminthotheca
                                             Helminthotheca echioides
                                                   [Picris echioides]
                                     Hemizonella
                                             Hemizonella minima
                                                   [Madia minima]
                                     Hemizonia
                                             Hemizonia congesta
                                               Hemizonia congesta subsp. calyculata
                                                     [Hemizonia calyculata]
                                               Hemizonia congesta subsp. clevelandii
                                                     [Hemizonia clevelandii]
                                               Hemizonia congesta subsp. congesta
                                                     [Hemizonia congesta subsp. leucocephala]
                                                     [Hemizonia leucocephala]
                                                     [Hemizonia lutescens]
                                                     [Hemizonia luzulifolia var. lutescens]
                                                     [Hemizonia multicaulis]
                                               Hemizonia congesta subsp. lutescens
                                                     [Hemizonia congesta subsp. vernalis]
                                                     [Hemizonia lutescens]
                                                     [Hemizonia luzulifolia var. lutescens]
                                                     [Hemizonia multicaulis subsp. vernalis]
                                                     [Hemizonia multicaulis]
                                               Hemizonia congesta subsp. luzulifolia
                                                     [Hemizonia luzulifolia subsp. rudis]
                                                     [Hemizonia luzulifolia]
                                               Hemizonia congesta subsp. tracyi
                                                     [Hemizonia luzulifolia subsp. tracyi]
                                                     [Hemizonia tracyi]
                                             Hemizonia multiglandulosa
                                     Hesperevax
                                             Hesperevax acaulis
                                                   [Evax acaulis]
                                                   [Stylocline acaulis]
                                               Hesperevax acaulis var. acaulis
                                                     [Evax acaulis]
                                                     [Stylocline acaulis]
                                               Hesperevax acaulis var. ambusticola
                                               Hesperevax acaulis var. robustior
                                             Hesperevax caulescens
                                                   [Evax acaulis]
                                                   [Evax caulescens var. humilis]
                                                   [Evax caulescens var. petiolata]
                                                   [Evax caulescens]
                                                   [Evax involucrata]
                                             Hesperevax sparsiflora
                                                   [Evax sparsiflora]
                                               Hesperevax sparsiflora var. brevifolia
                                                     [Evax sparsiflora var. brevifolia]
                                               Hesperevax sparsiflora var. sparsiflora
                                                     [Evax sparsiflora]
                                     Hesperodoria
                                     Hesperogenia
                                     Hesperomannia
                                             Hesperomannia arborescens
                                                   [Hesperomannia arborescens subsp. bushiana]
                                                   [Hesperomannia arborescens subsp. swezeyi]
                                                   [Hesperomannia arborescens var. bushiana]
                                                   [Hesperomannia arborescens var. swezeyi]
                                             Hesperomannia arbuscula
                                                   [Hesperomannia arbuscula subsp. oahuensis]
                                                   [Hesperomannia mauiensis]
                                               Hesperomannia arbuscula var. pearsallii
                                             Hesperomannia lydgatei
                                     Hesperomecon
                                     Hesperonia
                                     Hesperoscordum
                                     Heteranthemis
                                             Heteranthemis viscidehirta
                                     Heteropappus
                                             Heteropappus altaicus
                                               Heteropappus altaicus var. canescens
                                     Heterosperma
                                             Heterosperma pinnatum
                                     Heterotheca
                                             Heterotheca arizonica
                                                   [Heterotheca fulcrata var. arizonica]
                                             Heterotheca camporum
                                                   [Chrysopsis camporum]
                                                   [Chrysopsis villosa var. camporum]
                                                   [Heterotheca villosa var. camporum]
                                               Heterotheca camporum var. camporum
                                                     [Chrysopsis camporum]
                                                     [Chrysopsis villosa var. camporum]
                                                     [Heterotheca villosa var. camporum]
                                               Heterotheca camporum var. glandulissimum
                                                     [Chrysopsis camporum var. glandulissimum]
                                             Heterotheca canescens
                                                   [Chrysopsis berlandieri]
                                                   [Chrysopsis canescens]
                                                   [Chrysopsis villosa var. canescens]
                                             Heterotheca fulcrata
                                                   [Chrysopsis cryptocephala]
                                                   [Chrysopsis resinolens]
                                               Heterotheca fulcrata var. amplifolia
                                                     [Chrysopsis amplifolia]
                                                     [Chrysopsis caudata]
                                                     [Chrysopsis nitidula]
                                               Heterotheca fulcrata var. fulcrata
                                                     [Chrysopsis cryptocephala]
                                                     [Chrysopsis fulcrata]
                                                     [Chrysopsis resinolens]
                                               Heterotheca fulcrata var. senilis
                                                     [Chrysopsis senilis]
                                             Heterotheca grandiflora
                                                   [Heterotheca floribunda]
                                             Heterotheca hyssopifolia
                                             Heterotheca jonesii
                                                   [Chrysopsis jonesii]
                                             Heterotheca marginata
                                             Heterotheca monarchensis
                                             Heterotheca nitidula
                                                   [Chrysopsis nitidula]
                                             Heterotheca oregona
                                                   [Ammodia oregona]
                                                   [Chrysopsis oregona]
                                               Heterotheca oregona var. compacta
                                                     [Chrysopsis oregona var. compacta]
                                               Heterotheca oregona var. oregona
                                                     [Ammodia oregona]
                                                     [Chrysopsis oregona]
                                               Heterotheca oregona var. rudis
                                                     [Chrysopsis oregona var. rudis]
                                               Heterotheca oregona var. scaberrima
                                                     [Chrysopsis oregona var. scaberrima]
                                             Heterotheca polothrix
                                                   [Chrysopsis viscida subsp. cinerascens]
                                                   [Heterotheca horrida subsp. cinerascens]
                                                   [Heterotheca villosa var. scabra]
                                             Heterotheca pumila
                                                   [Chrysopsis alpicola var. glomerata]
                                                   [Chrysopsis alpicola]
                                                   [Chrysopsis cooperi]
                                                   [Chrysopsis pumila]
                                                   [Chrysopsis villosa var. glomerata]
                                             Heterotheca rutteri
                                                   [Chrysopsis rutteri]
                                             Heterotheca scabrella
                                             Heterotheca sessiliflora
                                               Heterotheca sessiliflora subsp. bolanderi
                                                     [Chrysopsis bolanderi]
                                                     [Chrysopsis villosa var. bolanderi]
                                                     [Heterotheca bolanderi]
                                               Heterotheca sessiliflora subsp. echioides
                                                     [Chrysopsis californica]
                                                     [Chrysopsis camphorata]
                                                     [Chrysopsis echioides]
                                                     [Chrysopsis villosa var. camphorata]
                                                     [Chrysopsis villosa var. echioides]
                                                     [Heterotheca camphorata]
                                                     [Heterotheca echioides]
                                                     [Heterotheca sessiliflora var. bolanderioides]
                                                     [Heterotheca sessiliflora var. camphorata]
                                                     [Heterotheca sessiliflora var. echioides]
                                               Heterotheca sessiliflora subsp. fastigiata
                                                     [Chrysopsis villosa var. fastigiata]
                                                     [Heterotheca fastigiata]
                                                     [Heterotheca sessiliflora var. fastigiata]
                                                     [Heterotheca sessiliflora var. sanjacintensis]
                                               Heterotheca sessiliflora subsp. sessiliflora
                                                     [Chrysopsis sessiliflora]
                                                     [Chrysopsis villosa var. sessiliflora]
                                             Heterotheca shevockii
                                                   [Heterotheca villosa var. shevockii]
                                             Heterotheca sierrablancensis
                                                   [Heterotheca villosa var. sierrablancensis]
                                             Heterotheca stenophylla
                                                   [Chrysopsis hispida var. stenophylla]
                                                   [Chrysopsis scabrifolia]
                                                   [Chrysopsis stenophylla]
                                               Heterotheca stenophylla var. angustifolia
                                                     [Chrysopsis angustifolia]
                                                     [Chrysopsis villosa var. angustifolia]
                                                     [Heterotheca villosa var. angustifolia]
                                               Heterotheca stenophylla var. stenophylla
                                                     [Chrysopsis hispida var. stenophylla]
                                                     [Chrysopsis scabrifolia]
                                                     [Chrysopsis stenophylla]
                                                     [Chrysopsis villosa var. stenophylla]
                                             Heterotheca subaxillaris
                                                   [Chrysopsis scabra]
                                                   [Heterotheca lamarckii]
                                                   [Heterotheca latifolia var. arkansana]
                                                   [Heterotheca latifolia var. macgregoris]
                                                   [Heterotheca latifolia]
                                                   [Heterotheca psammophila]
                                                   [Heterotheca scabra]
                                                   [Heterotheca subaxillaris var. latifolia]
                                                   [Heterotheca subaxillaris var. petiolaris]
                                                   [Heterotheca subaxillaris var. procumbens]
                                                   [Heterotheca subaxillaris var. psammophila]
                                               Heterotheca subaxillaris subsp. latifolia
                                                     [Heterotheca latifolia var. arkansana]
                                                     [Heterotheca latifolia var. macgregoris]
                                                     [Heterotheca latifolia]
                                                     [Heterotheca psammophila]
                                                     [Heterotheca subaxillaris var. latifolia]
                                                     [Heterotheca subaxillaris var. petiolaris]
                                                     [Heterotheca subaxillaris var. psammophila]
                                               Heterotheca subaxillaris subsp. subaxillaris
                                                     [Chrysopsis scabra]
                                                     [Heterotheca scabra]
                                             Heterotheca villosa
                                                   [Chrysopsis canescens]
                                                   [Chrysopsis caudata]
                                                   [Chrysopsis mollis]
                                               Heterotheca villosa var. ballardii
                                                     [Chrysopsis ballardii]
                                               Heterotheca villosa var. depressa
                                                     [Chrysopsis depressa]
                                                     [Heterotheca depressa]
                                               Heterotheca villosa var. foliosa
                                                     [Chrysopsis butleri]
                                                     [Chrysopsis foliosa]
                                                     [Chrysopsis hirsutissima]
                                                     [Chrysopsis imbricata]
                                                     [Chrysopsis villosa var. foliosa]
                                                     [Heterotheca foliosa]
                                               Heterotheca villosa var. minor
                                                     [Chrysopsis arida]
                                                     [Chrysopsis bakeri]
                                                     [Chrysopsis barbata]
                                                     [Chrysopsis columbiana]
                                                     [Chrysopsis hirsutissima]
                                                     [Chrysopsis hispida]
                                                     [Chrysopsis villosa var. hispida]
                                                     [Chrysopsis wisconsinensis]
                                                     [Heterotheca barbata]
                                                     [Heterotheca villosa var. hispida]
                                                     [Heterotheca wisconsinensis]
                                               Heterotheca villosa var. nana
                                                     [Chrysopsis canescens var. nana]
                                                     [Chrysopsis horrida]
                                                     [Heterotheca horrida]
                                                     [Heterotheca villosa var. horrida]
                                               Heterotheca villosa var. pedunculata
                                                     [Chrysopsis pedunculata]
                                               Heterotheca villosa var. villosa
                                                     [Chrysopsis mollis]
                                                     [Heterotheca villosa var. villosa/Symphyotrichum ericoides]
                                             Heterotheca viscida
                                                   [Chrysopsis villosa var. viscida]
                                                   [Chrysopsis viscida]
                                             Heterotheca zionensis
                                     Heterotrichum
                                     Hieracium
                                             Hieracium alleghaniense
                                             Hieracium atramentarium
                                             Hieracium bolanderi
                                                   [Hieracium siskiyouense]
                                             Hieracium brachiatum
                                             Hieracium brevipilum
                                                   [Hieracium fendleri var. mogollense]
                                             Hieracium carneum
                                             Hieracium crepidispermum
                                                   [Hieracium lemmonii]
                                             Hieracium fassettii
                                               Hieracium fassettii var. fassettii
                                               Hieracium fassettii var. mendicum
                                               Hieracium fassettii var. wisconsinense
                                             Hieracium fendleri
                                                   [Chlorocrepis fendleri]
                                               Hieracium fendleri var. discolor
                                               Hieracium fendleri var. fendleri
                                                     [Chlorocrepis fendleri]
                                             Hieracium fernaldii
                                                   [Hieracium canadense var. hirtirameum]
                                             Hieracium floribundum
                                                   [Hieracium auricula]
                                                   [Hieracium dorei]
                                             Hieracium fuscatrum
                                             Hieracium greenei
                                             Hieracium grohii
                                               Hieracium grohii var. farwellii
                                               Hieracium grohii var. grohii
                                             Hieracium gronovii
                                                   [Hieracium gronovii var. foliosum]
                                             Hieracium lachenalii
                                                   [Hieracium acuminatum]
                                                   [Hieracium vulgatum]
                                               Hieracium lachenalii subsp. acuminatum
                                                     [Hieracium acuminatum]
                                             Hieracium laevigatum
                                                   [Hieracium acranthophorum var. isortoquense]
                                                   [Hieracium acranthophorum]
                                                   [Hieracium devoldii]
                                                   [Hieracium eugenii]
                                                   [Hieracium musartutense]
                                                   [Hieracium nepiocratum]
                                                   [Hieracium rigorosum var. nanusekense]
                                                   [Hieracium rigorosum var. sermilikense]
                                                   [Hieracium rigorosum var. unanakense]
                                                   [Hieracium rigorosum]
                                                   [Hieracium stiptocaule]
                                             Hieracium longiberbe
                                             Hieracium maculatum
                                               Hieracium maculatum subsp. arrectariicaule
                                                     [Hieracium vulgatum]
                                             Hieracium marianum
                                                   [Hieracium pennsylvanicum]
                                             Hieracium megacephalon
                                                   [Hieracium argyraeum]
                                             Hieracium megacephalum
                                                   [Hieracium argyraeum]
                                             Hieracium murorum
                                             Hieracium nudicaule
                                                   [Hieracium cynoglossoides var. nudicaule]
                                                   [Hieracium scouleri var. nudicaule]
                                             Hieracium parryi
                                             Hieracium pringlei
                                             Hieracium riddelsdellii
                                             Hieracium robinsonii
                                                   [Hieracium ungavense]
                                             Hieracium sabaudum
                                                   [Hieracium vagum]
                                               Hieracium sabaudum subsp. vagum
                                                     [Hieracium vagum]
                                             Hieracium scabrum
                                                   [Hieracium scabrum var. intonsum]
                                                   [Hieracium scabrum var. tonsum]
                                               Hieracium scabrum var. scabrum
                                             Hieracium scouleri
                                               Hieracium scouleri var. scouleri
                                                     [Hieracium chapacanum]
                                             Hieracium scribneri
                                             Hieracium traillii
                                                   [Hieracium greenii]
                                             Hieracium umbellatum
                                                   [Hieracium columbianum]
                                                   [Hieracium scabriusculum var. columbianum]
                                                   [Hieracium scabriusculum var. perhirsutum]
                                                   [Hieracium scabriusculum var. saximontanum]
                                                   [Hieracium scabriusculum var. scabrum]
                                                   [Hieracium scabriusculum]
                                               Hieracium umbellatum subsp. umbellatum
                                                     [Hieracium acranthophorum var. isortoquense]
                                                     [Hieracium acranthophorum]
                                                     [Hieracium canadense var. canadense]
                                                     [Hieracium canadense var. fasciculatum]
                                                     [Hieracium canadense var. hirtirameum]
                                                     [Hieracium canadense var. kalmii]
                                                     [Hieracium canadense var. subintegrum]
                                                     [Hieracium canadense]
                                                     [Hieracium columbianum]
                                                     [Hieracium devoldii]
                                                     [Hieracium eugenii]
                                                     [Hieracium kalmii var. canadense]
                                                     [Hieracium kalmii var. fasciculatum]
                                                     [Hieracium kalmii var. kalmii]
                                                     [Hieracium kalmii var. subintegrum]
                                                     [Hieracium kalmii]
                                                     [Hieracium musartutense]
                                                     [Hieracium nepiocratum]
                                                     [Hieracium rigorosum]
                                                     [Hieracium scabriusculum var. columbianum]
                                                     [Hieracium scabriusculum var. perhirsutum]
                                                     [Hieracium scabriusculum var. saximontanum]
                                                     [Hieracium scabriusculum var. scabrum]
                                                     [Hieracium scabriusculum]
                                                     [Hieracium stiptocaule]
                                                     [Hieracium umbellatum subsp. canadense]
                                                     [Hieracium umbellatum subsp. scabriusculum]
                                                     [Hieracium umbellatum var. scabriusculum]
                                     Hofmeisteria
                                     Holocarpha
                                             Holocarpha heermannii
                                             Holocarpha macradenia
                                             Holocarpha obconica
                                                   [Holocarpha obconica subsp. autumnalis]
                                               Holocarpha obconica subsp. obconica
                                             Holocarpha virgata
                                               Holocarpha virgata subsp. elongata
                                               Holocarpha virgata subsp. virgata
                                     Holozonia
                                             Holozonia filipes
                                     Homalocephala
                                     Hulsea
                                             Hulsea algida
                                                   [Hulsea caespitosa]
                                                   [Hulsea carnosa]
                                                   [Hulsea nevadensis]
                                             Hulsea brevifolia
                                             Hulsea californica
                                             Hulsea heterochroma
                                             Hulsea mexicana
                                             Hulsea nana
                                                   [Hulsea larsenii]
                                                   [Hulsea nana var. larsenii]
                                                   [Hulsea volcanica]
                                             Hulsea vestita
                                               Hulsea vestita subsp. callicarpha
                                                     [Hulsea callicarpha]
                                                     [Hulsea vestita var. callicarpha]
                                               Hulsea vestita subsp. gabrielensis
                                               Hulsea vestita subsp. inyoensis
                                                     [Hulsea californica subsp. inyoensis]
                                                     [Hulsea californica var. inyoensis]
                                                     [Hulsea inyoensis]
                                               Hulsea vestita subsp. parryi
                                                     [Hulsea parryi]
                                               Hulsea vestita subsp. pygmaea
                                                     [Hulsea vestita var. pygmaea]
                                               Hulsea vestita subsp. vestita
                                     Hulteniella
                                     Hymenoclea
                                     Hymenodium
                                     Hymenolobus
                                     Hymenopappus
                                             Hymenopappus artemisiifolius
                                                   [Hymenopappus scabiosaeus var. artemisiifolius]
                                               Hymenopappus artemisiifolius var. artemisiifolius
                                                     [Hymenopappus scabiosaeus var. artemisiifolius]
                                               Hymenopappus artemisiifolius var. riograndensis
                                                     [Hymenopappus scabiosaeus var. riograndensis]
                                             Hymenopappus biennis
                                             Hymenopappus carrizoanus
                                             Hymenopappus filifolius
                                               Hymenopappus filifolius var. cinereus
                                                     [Hymenopappus arenosus]
                                                     [Hymenopappus cinereus]
                                               Hymenopappus filifolius var. eriopodus
                                                     [Hymenopappus eriopodus]
                                               Hymenopappus filifolius var. filifolius
                                               Hymenopappus filifolius var. idahoensis
                                               Hymenopappus filifolius var. lugens
                                                     [Hymenopappus gloriosus]
                                                     [Hymenopappus lugens]
                                               Hymenopappus filifolius var. luteus
                                                     [Hymenopappus luteus]
                                               Hymenopappus filifolius var. megacephalus
                                               Hymenopappus filifolius var. nanus
                                               Hymenopappus filifolius var. nudipes
                                                     [Hymenopappus filifolius var. alpestris]
                                               Hymenopappus filifolius var. parvulus
                                               Hymenopappus filifolius var. pauciflorus
                                                     [Hymenopappus pauciflorus]
                                               Hymenopappus filifolius var. polycephalus
                                                     [Hymenopappus polycephalus]
                                               Hymenopappus filifolius var. tomentosus
                                             Hymenopappus flavescens
                                               Hymenopappus flavescens var. canotomentosus
                                                     [Hymenopappus robustus]
                                               Hymenopappus flavescens var. flavescens
                                             Hymenopappus mexicanus
                                             Hymenopappus newberryi
                                                   [Leucampyx newberryi]
                                             Hymenopappus radiatus
                                             Hymenopappus scabiosaeus
                                               Hymenopappus scabiosaeus var. corymbosus
                                                     [Hymenopappus corymbosus]
                                               Hymenopappus scabiosaeus var. scabiosaeus
                                                     [Hymenopappus carolinensis]
                                             Hymenopappus tenuifolius
                                     Hymenothrix
                                             Hymenothrix autumnalis
                                             Hymenothrix biternata
                                                   [Bahia biternata]
                                             Hymenothrix dissecta
                                                   [Amauria dissecta]
                                                   [Amauriopsis dissecta]
                                                   [Bahia dissecta]
                                             Hymenothrix loomisii
                                             Hymenothrix pedata
                                                   [Bahia pedata]
                                             Hymenothrix wislizeni
                                             Hymenothrix wrightii
                                     Hymenoxys
                                             Hymenoxys ambigens
                                                   [Plummera ambigens]
                                               Hymenoxys ambigens var. ambigens
                                                     [Plummera ambigens]
                                               Hymenoxys ambigens var. floribunda
                                                     [Hymenoxys microcephala]
                                                     [Plummera floribunda]
                                               Hymenoxys ambigens var. neomexicana
                                             Hymenoxys anthemoides
                                             Hymenoxys bigelovii
                                                   [Macdougalia bigelovii]
                                             Hymenoxys brachyactis
                                             Hymenoxys brandegei
                                             Hymenoxys cooperi
                                                   [Actinea canescens]
                                                   [Actinea cooperi]
                                                   [Hymenoxys cooperi var. canescens]
                                               Hymenoxys cooperi var. cooperi
                                                     [Actinea cooperi]
                                             Hymenoxys grandiflora
                                                   [Actinea grandiflora]
                                                   [Rydbergia grandiflora]
                                                   [Tetraneuris grandiflora]
                                             Hymenoxys helenioides
                                                   [Picradenia helenioides]
                                             Hymenoxys herbacea
                                             Hymenoxys hoopesii
                                                   [Dugaldia hoopesii]
                                                   [Helenium hoopesii]
                                             Hymenoxys jamesii
                                             Hymenoxys lemmonii
                                             Hymenoxys odorata
                                                   [Picradenia odorata]
                                             Hymenoxys perpygmaea
                                             Hymenoxys quinquesquamata
                                             Hymenoxys richardsonii
                                                   [Actinea richardsonii]
                                                   [Actinella richardsonii]
                                                   [Picradenia richardsonii]
                                               Hymenoxys richardsonii var. floribunda
                                                     [Actinella richardsonii var. floribunda]
                                                     [Hymenoxys olivacea]
                                                     [Hymenoxys richardsonii var. utahensis]
                                                     [Picradenia richardsonii subsp. floribunda]
                                                     [Picradenia richardsonii var. floribunda]
                                               Hymenoxys richardsonii var. richardsonii
                                                     [Actinea richardsonii]
                                                     [Picradenia richardsonii]
                                             Hymenoxys rusbyi
                                             Hymenoxys subintegra
                                             Hymenoxys texana
                                             Hymenoxys vaseyi
                                                   [Actinea vaseyi]
                                     Hyoseris
                                     Hypochaeris
                                             Hypochaeris albiflora
                                                   [Hypochaeris microcephala var. albiflora]
                                             Hypochaeris chillensis
                                                   [Hypochaeris brasiliensis var. tweediei]
                                                   [Hypochaeris brasiliensis]
                                                   [Hypochaeris tweediei]
                                             Hypochaeris elata
                                             Hypochaeris glabra
                                             Hypochaeris microcephala
                                             Hypochaeris radicata
                                     Hypochoeris
                                     Inula
                                             Inula britannica
                                             Inula helenium
                                             Inula salicina
                                             Inula spiraeifolia
                                                   [Aster squarrosus]
                                     Ionactis
                                             Ionactis alpina
                                                   [Aster scopulorum]
                                                   [Chrysopsis alpina]
                                             Ionactis caelestis
                                             Ionactis elegans
                                                   [Chaetopappa elegans]
                                             Ionactis linariifolia
                                                   [Aster linariifolius var. victorinii]
                                                   [Aster linariifolius]
                                             Ionactis linariifolius
                                                   [Aster linariifolius var. victorinii]
                                                   [Aster linariifolius]
                                             Ionactis stenomeres
                                                   [Aster stenomeres]
                                     Ionidium
                                     Isocarpha
                                             Isocarpha oppositifolia
                                                   [Calea oppositifolia]
                                     Isocoma
                                             Isocoma acradenia
                                                   [Haplopappus acradenius]
                                               Isocoma acradenia var. acradenia
                                                     [Haplopappus acradenius]
                                               Isocoma acradenia var. bracteosa
                                                     [Haplopappus acradenius subsp. bracteosus]
                                                     [Isocoma bracteosa]
                                               Isocoma acradenia var. eremophila
                                                     [Haplopappus acradenius subsp. eremophilus]
                                                     [Isocoma acradenia subsp. eremophila]
                                                     [Isocoma eremophila]
                                             Isocoma arguta
                                                   [Haplopappus venetus var. argutus]
                                             Isocoma azteca
                                             Isocoma coronopifolia
                                                   [Isocoma coronopifolia var. pedicellata]
                                                   [Isocoma pedicellata]
                                             Isocoma drummondii
                                                   [Haplopappus drummondii]
                                                   [Isocoma megalantha]
                                             Isocoma humilis
                                                   [Haplopappus leverichii]
                                             Isocoma menziesii
                                                   [Haplopappus venetus subsp. oxyphyllus]
                                                   [Isocoma oxyphylla]
                                                   [Isocoma veneta var. oxyphylla]
                                               Isocoma menziesii var. decumbens
                                                     [Haplopappus venetus subsp. furfuraceus]
                                                     [Isocoma veneta var. furfuracea]
                                               Isocoma menziesii var. diabolica
                                               Isocoma menziesii var. menziesii
                                                     [Haplopappus venetus subsp. oxyphyllus]
                                                     [Isocoma oxyphylla]
                                                     [Isocoma veneta var. oxyphylla]
                                               Isocoma menziesii var. sedoides
                                                     [Haplopappus venetus var. sedoides]
                                                     [Isocoma veneta var. sedoides]
                                               Isocoma menziesii var. vernonioides
                                                     [Isocoma veneta var. vernonioides]
                                                     [Isocoma vernonioides]
                                             Isocoma pluriflora
                                                   [Haplopappus heterophyllus]
                                                   [Haplopappus pluriflorus]
                                                   [Isocoma wrightii]
                                             Isocoma rusbyi
                                                   [Haplopappus rusbyi]
                                             Isocoma tenuisecta
                                                   [Haplopappus tenuisectus]
                                             Isocoma veneta
                                     Iva
                                             Iva annua
                                                   [Iva ciliata]
                                               Iva annua var. annua
                                                     [Iva ciliata]
                                               Iva annua var. caudata
                                                     [Iva caudata]
                                               Iva annua var. macrocarpa
                                                     [Iva ciliata var. macrocarpa]
                                             Iva asperifolia
                                               Iva asperifolia var. angustifolia
                                                     [Iva angustifolia]
                                             Iva axillaris
                                                   [Iva axillaris subsp. robustior]
                                                   [Iva axillaris var. robustior]
                                             Iva cheiranthifolia
                                             Iva frutescens
                                               Iva frutescens subsp. frutescens
                                               Iva frutescens subsp. oraria
                                                     [Iva frutescens var. oraria]
                                             Iva hayesiana
                                             Iva imbricata
                                             Iva microcephala
                                             Iva texensis
                                                   [Iva angustifolia var. latior]
                                     Ixeris
                                             Ixeris stolonifera
                                     Jacobaea
                                             Jacobaea aquatica
                                                   [Senecio aquaticus]
                                             Jacobaea cannabifolia
                                                   [Senecio cannabifolius]
                                             Jacobaea erratica
                                                   [Senecio aquaticus subsp. barbareifolius]
                                                   [Senecio erraticus]
                                             Jacobaea erucifolia
                                               Jacobaea erucifolia subsp. erucifolia
                                                     [Senecio erucifolius]
                                             Jacobaea maritima
                                               Jacobaea maritima subsp. bicolor
                                                     [Senecio bicolor]
                                               Jacobaea maritima subsp. maritima
                                                     [Senecio bicolor subsp. cineraria]
                                                     [Senecio cineraria]
                                             Jacobaea pseudoarnica
                                                   [Senecio pseudoarnica]
                                             Jacobaea vulgaris
                                               Jacobaea vulgaris subsp. vulgaris
                                                     [Senecio jacobaea]
                                     Jaegeria
                                             Jaegeria hirta
                                     Jamesianthus
                                             Jamesianthus alabamensis
                                     Janipha
                                     Jaumea
                                             Jaumea carnosa
                                     Jefea
                                             Jefea brevifolia
                                                   [Zexmenia brevifolia]
                                     Jensia
                                             Jensia rammii
                                                   [Madia rammii]
                                             Jensia yosemitana
                                                   [Madia yosemitana]
                                     Kalimeris
                                     Keysseria
                                             Keysseria erici
                                                   [Lagenifera erici]
                                             Keysseria helenae
                                                   [Lagenifera helenae]
                                             Keysseria maviensis
                                                   [Keysseria lavandula]
                                                   [Lagenifera maviensis]
                                                   [Lagenophora viridis]
                                     Kleinia
                                     Koanophyllon
                                             Koanophyllon coulteri
                                             Koanophyllon dolicholepis
                                                   [Eupatorium dolicholepis]
                                             Koanophyllon droserolepis
                                                   [Eupatorium droserolepis]
                                             Koanophyllon polyodon
                                                   [Eupatorium polyodon]
                                             Koanophyllon solidaginifolium
                                                   [Eupatorium solidaginifolium]
                                             Koanophyllon villosum
                                                   [Eupatorium villosum]
                                               Koanophyllon villosum subsp. villosum
                                                     [Eupatorium villosum]
                                     Krigia
                                             Krigia biflora
                                                   [Cynthia viridis]
                                                   [Hyoseris biflora]
                                                   [Krigia amplexicaulis]
                                                   [Krigia biflora var. viridis]
                                               Krigia biflora var. biflora
                                                     [Hyoseris biflora]
                                                     [Krigia amplexicaulis]
                                                     [Krigia biflora subsp. glandulifera]
                                             Krigia caespitosa
                                                   [Krigia gracilis]
                                                   [Krigia oppositifolia]
                                                   [Serinia oppositifolia]
                                             Krigia cespitosa
                                                   [Krigia oppositifolia]
                                                   [Serinia oppositifolia]
                                               Krigia cespitosa var. gracilis
                                                     [Krigia gracilis]
                                             Krigia dandelion
                                                   [Cacalia tuberosa]
                                                   [Cynthia dandelion]
                                             Krigia montana
                                                   [Cynthia montana]
                                             Krigia occidentalis
                                                   [Cymbia occidentalis]
                                             Krigia virginica
                                                   [Hyoseris virginica]
                                             Krigia wrightii
                                     Kruhsea
                                     Krynitzkia
                                     Kuhnia
                                     Kuhnistera
                                     Kyhosia
                                             Kyhosia bolanderi
                                                   [Madia bolanderi]
                                     Lactuca
                                             Lactuca biennis
                                                   [Lactuca spicata var. integrifolia]
                                                   [Lactuca spicata]
                                                   [Mulgedium spicatum var. integrifolium]
                                                   [Mulgedium spicatum]
                                             Lactuca canadensis
                                                   [Lactuca canadensis var. integrifolia]
                                                   [Lactuca canadensis var. latifolia]
                                                   [Lactuca canadensis var. longifolia]
                                                   [Lactuca canadensis var. obovata]
                                                   [Lactuca canadensis var. typica]
                                                   [Lactuca sagittifolia]
                                                   [Lactuca steelei]
                                             Lactuca floridana
                                                   [Lactuca floridana var. villosa]
                                                   [Lactuca villosa]
                                                   [Mulgedium floridanum]
                                                   [Mulgedium villosum]
                                               Lactuca floridana var. floridana
                                                     [Mulgedium floridanum]
                                             Lactuca graminifolia
                                                   [Lactuca graminifolia var. arizonica]
                                               Lactuca graminifolia var. graminifolia
                                             Lactuca hirsuta
                                                   [Lactuca hirsuta var. albiflora]
                                                   [Lactuca hirsuta var. sanguinea]
                                               Lactuca hirsuta var. hirsuta
                                             Lactuca indica
                                             Lactuca ludoviciana
                                                   [Lactuca campestris var. typica]
                                                   [Lactuca campestris]
                                             Lactuca morssii
                                             Lactuca muralis
                                                   [Mycelis muralis]
                                             Lactuca pulchella
                                                   [Lactuca oblongifolia]
                                                   [Lactuca tatarica subsp. pulchella]
                                                   [Lactuca tatarica var. heterophylla]
                                                   [Lactuca tatarica var. pulchella]
                                                   [Mulgedium pulchellum]
                                             Lactuca quercina
                                               Lactuca quercina subsp. quercina
                                                     [Prenanthes altissima]
                                             Lactuca saligna
                                                   [Lactuca saligna var. runcinata]
                                             Lactuca sativa
                                                   [Lactuca scariola var. integrata]
                                                   [Lactuca scariola var. integrifolia]
                                             Lactuca serriola
                                                   [Lactuca scariola]
                                             Lactuca stolonifera
                                             Lactuca tatarica
                                                   [Sonchus tataricus]
                                             Lactuca virosa
                                     Laennecia
                                             Laennecia coulteri
                                                   [Conyza coulteri var. virgata]
                                                   [Conyza coulteri]
                                                   [Eschenbachia coulteri]
                                             Laennecia eriophylla
                                                   [Conyza eriophylla]
                                                   [Erigeron eriophyllus]
                                             Laennecia filaginoides
                                                   [Conyza filaginoides]
                                             Laennecia schiedeana
                                                   [Conyza schiedeana]
                                                   [Erigeron schiedeanus]
                                                   [Leptilon integrifolium]
                                             Laennecia sophiifolia
                                                   [Conyza coulteri var. tenuisecta]
                                                   [Conyza sophiifolia]
                                                   [Eschenbachia tenuisecta]
                                             Laennecia turnerorum
                                     Lagascea
                                             Lagascea decipiens
                                               Lagascea decipiens var. glandulosa
                                             Lagascea mollis
                                                   [Nocca mollis]
                                     Lagenifera
                                     Lagenophora
                                     Lagophylla
                                             Lagophylla diabolensis
                                             Lagophylla dichotoma
                                             Lagophylla glandulosa
                                                   [Lagophylla glandulosa subsp. serrata]
                                             Lagophylla minor
                                             Lagophylla ramosissima
                                                   [Lagophylla congesta]
                                                   [Lagophylla ramosissima subsp. congesta]
                                               Lagophylla ramosissima subsp. ramosissima
                                     Lapsana
                                             Lapsana communis
                                     Lapsanastrum
                                             Lapsanastrum apogonoides
                                                   [Lapsana apogonoides]
                                     Lasianthaea
                                             Lasianthaea podocephala
                                                   [Verbesina podocephala]
                                                   [Zexmenia podocephala]
                                     Lasiospermum
                                             Lasiospermum bipinnatum
                                                   [Lasiospermum radiatum]
                                                   [Lidbeckia bipinnata]
                                     Lasthenia
                                             Lasthenia burkei
                                             Lasthenia californica
                                               Lasthenia californica subsp. bakeri
                                                     [Baeria bakeri]
                                                     [Baeria macrantha var. bakeri]
                                                     [Lasthenia macrantha subsp. bakeri]
                                               Lasthenia californica subsp. californica
                                                     [Baeria chrysostoma subsp. gracilis]
                                                     [Baeria chrysostoma subsp. hirsutula]
                                                     [Baeria chrysostoma var. gracilis]
                                                     [Baeria chrysostoma]
                                                     [Baeria hirsutula]
                                                     [Lasthenia chrysostoma]
                                               Lasthenia californica subsp. macrantha
                                                     [Baeria macrantha var. pauciaristata]
                                                     [Baeria macrantha var. thalassophila]
                                                     [Baeria macrantha]
                                                     [Lasthenia macrantha subsp. macrantha]
                                                     [Lasthenia macrantha subsp. prisca]
                                                     [Lasthenia macrantha]
                                             Lasthenia chrysantha
                                                   [Crockeria chrysantha]
                                             Lasthenia conjugens
                                                   [Baeria fremontii var. conjugens]
                                             Lasthenia coronaria
                                                   [Baeria californica]
                                             Lasthenia debilis
                                                   [Baeria debilis]
                                             Lasthenia ferrisiae
                                             Lasthenia fremontii
                                                   [Baeria fremontii var. heterochaeta]
                                                   [Baeria fremontii]
                                             Lasthenia glaberrima
                                             Lasthenia glabrata
                                               Lasthenia glabrata subsp. coulteri
                                                     [Lasthenia glabrata var. coulteri]
                                               Lasthenia glabrata subsp. glabrata
                                             Lasthenia gracilis
                                                   [Baeria chrysostoma subsp. gracilis]
                                                   [Baeria chrysostoma var. gracilis]
                                             Lasthenia leptalea
                                                   [Baeria leptalea]
                                             Lasthenia maritima
                                                   [Baeria maritima]
                                                   [Baeria minor subsp. maritima]
                                                   [Lasthenia minor subsp. maritima]
                                                   [Lasthenia minor var. maritima]
                                             Lasthenia microglossa
                                                   [Baeria microglossa]
                                             Lasthenia minor
                                                   [Baeria minor]
                                                   [Baeria uliginosa]
                                             Lasthenia ornduffii
                                                   [Lasthenia macrantha subsp. prisca]
                                             Lasthenia platycarpha
                                                   [Baeria platycarpha]
                                     Lastrea
                                             Lastrea limbosperma
                                     Launaea
                                             Launaea intybacea
                                                   [Bracyrhamphus intybaceus]
                                                   [Lactuca intybacea]
                                             Launaea remotiflora
                                                   [Cacalia sonchifolia]
                                     Laurocerasus
                                     Layia
                                             Layia carnosa
                                             Layia chrysanthemoides
                                                   [Layia chrysanthemoides subsp. maritima]
                                             Layia discoidea
                                             Layia fremontii
                                             Layia gaillardioides
                                             Layia glandulosa
                                                   [Layia glandulosa subsp. lutea]
                                             Layia heterotricha
                                             Layia hieracioides
                                                   [Layia paniculata]
                                             Layia jonesii
                                             Layia leucopappa
                                             Layia munzii
                                             Layia pentachaeta
                                               Layia pentachaeta subsp. pentachaeta
                                             Layia platyglossa
                                                   [Layia platyglossa subsp. campestris]
                                                   [Layia platyglossa var. breviseta]
                                                   [Layia ziegleri]
                                             Layia septentrionalis
                                     Leibnitzia
                                             Leibnitzia lyrata
                                                   [Chaptalia alsophila]
                                                   [Chaptalia leucocephala]
                                                   [Chaptalia seemannii]
                                                   [Leibnitzia seemannii]
                                     Leiodon
                                     Lembertia
                                     Leontodon
                                             Leontodon boryi
                                                   [Apargia hispida]
                                             Leontodon hirtus
                                             Leontodon hispidus
                                               Leontodon hispidus subsp. hastilis
                                                     [Leontodon danubialis]
                                                     [Leontodon hastilis var. glabratus]
                                                     [Leontodon hispidus subsp. danubialis]
                                                     [Leontodon hispidus var. glabratus]
                                               Leontodon hispidus subsp. hispidus
                                                     [Apargia hispida]
                                                     [Leontodon hastilis var. vulgaris]
                                             Leontodon longirostris
                                                   [Leontodon taraxacoides subsp. longirostris]
                                             Leontodon nudicaulis
                                             Leontodon saxatilis
                                               Leontodon saxatilis subsp. saxatilis
                                                     [Apargia nudicaulis]
                                                     [Leontodon leysseri]
                                                     [Leontodon nudicaulis subsp. taraxacoides]
                                                     [Leontodon taraxacoides subsp. taraxacoides]
                                                     [Leontodon taraxacoides]
                                     Lepidaploa
                                             Lepidaploa borinquensis
                                                   [Vernonia borinquensis]
                                             Lepidaploa glabra
                                                   [Vernonia albicaulis]
                                             Lepidaploa sericea
                                                   [Vernonia sericea]
                                     Lepidospartum
                                             Lepidospartum burgessii
                                             Lepidospartum latisquamum
                                             Lepidospartum squamatum
                                                   [Lepidospartum squamatum var. palmeri]
                                     Lepidotheca
                                     Lepidotis
                                             Lepidotis inundata
                                     Leptostelma
                                             Leptostelma maxima
                                     Lessingia
                                             Lessingia arachnoidea
                                                   [Lessingia hololeuca var. arachnoidea]
                                                   [Lessingia micradenia var. arachnoidea]
                                             Lessingia germanorum
                                             Lessingia glandulifera
                                                   [Lessingia germanorum var. glandulifera]
                                                   [Lessingia germanorum var. lemmonii]
                                                   [Lessingia germanorum var. ramulosissima]
                                                   [Lessingia lemmonii var. lemmonii]
                                                   [Lessingia lemmonii var. ramulosissima]
                                                   [Lessingia lemmonii]
                                               Lessingia glandulifera var. glandulifera
                                                     [Lessingia germanorum var. glandulifera]
                                               Lessingia glandulifera var. peirsonii
                                                     [Lessingia germanorum var. peirsonii]
                                                     [Lessingia lemmonii var. peirsonii]
                                               Lessingia glandulifera var. tomentosa
                                                     [Lessingia germanorum var. tomentosa]
                                             Lessingia hololeuca
                                             Lessingia leptoclada
                                             Lessingia micradenia
                                                   [Lessingia ramulosa var. micradenia]
                                               Lessingia micradenia var. glabrata
                                                     [Lessingia ramulosa var. glabrata]
                                               Lessingia micradenia var. micradenia
                                                     [Lessingia ramulosa var. micradenia]
                                             Lessingia nana
                                             Lessingia nemaclada
                                                   [Lessingia nemaclada var. albiflora]
                                                   [Lessingia nemaclada var. mendocina]
                                               Lessingia nemaclada var. nemaclada
                                             Lessingia pectinata
                                                   [Lessingia germanorum var. pectinata]
                                                   [Lessingia glandulifera var. pectinata]
                                             Lessingia ramulosa
                                                   [Lessingia ramulosa var. adenophora]
                                               Lessingia ramulosa var. ramulosa
                                             Lessingia tenuis
                                                   [Lessingia germanorum var. parvula]
                                                   [Lessingia germanorum var. tenuis]
                                             Lessingia virgata
                                               Lessingia virgata var. glomerata
                                               Lessingia virgata var. virgata
                                     Leucacantha
                                     Leucanthemella
                                             Leucanthemella serotina
                                                   [Chrysanthemum serotinum]
                                                   [Chrysanthemum uliginosum]
                                                   [Leucanthemum serotinum]
                                                   [Tanacetum serotinum]
                                     Leucanthemum
                                             Leucanthemum lacustre
                                                   [Chrysanthemum lacustre]
                                             Leucanthemum maximum
                                                   [Chrysanthemum maximum]
                                             Leucanthemum superbum
                                                   [Chrysanthemum superbum]
                                             Leucanthemum vulgare
                                                   [Chrysanthemum leucanthemum var. boecheri]
                                                   [Chrysanthemum leucanthemum var. pinnatifidum]
                                                   [Chrysanthemum leucanthemum]
                                                   [Leucanthemum leucanthemum]
                                                   [Leucanthemum vulgare var. pinnatifidum]
                                               Leucanthemum vulgare subsp. vulgare
                                                     [Chrysanthemum leucanthemum var. boecheri]
                                                     [Chrysanthemum leucanthemum var. pinnatifidum]
                                                     [Chrysanthemum leucanthemum]
                                                     [Leucanthemum leucanthemum]
                                                     [Tanacetum serotinum]
                                     Leuciva
                                     Leucosyris
                                             Leucosyris arida
                                                   [Arida arizonica]
                                                   [Machaeranthera ammophila]
                                                   [Machaeranthera arida]
                                                   [Machaeranthera arizonica]
                                                   [Machaeranthera coulteri var. arida]
                                             Leucosyris blepharophylla
                                                   [Aster blepharophyllus]
                                                   [Machaeranthera gypsitherma]
                                             Leucosyris carnosa
                                                   [Arida carnosa]
                                                   [Aster intricatus]
                                                   [Bigelovia intricata]
                                                   [Leucosyris carnosa var. intricata]
                                                   [Linosyris carnosa]
                                                   [Machaeranthera carnosa var. carnosa]
                                                   [Machaeranthera carnosa var. intricata]
                                                   [Machaeranthera carnosa]
                                             Leucosyris coulteri
                                                   [Machaeranthera coulteri]
                                                   [Psilactis coulteri]
                                             Leucosyris parviflora
                                                   [Aster parvulus]
                                                   [Machaeranthera parviflora]
                                                   [Machaeranthera pygmaea]
                                             Leucosyris riparia
                                                   [Aster riparius]
                                                   [Aster sonorae]
                                                   [Machaeranthera riparia]
                                                   [Machaeranthera sonorae]
                                     Liatris
                                             Liatris acidota
                                                   [Lacinaria acidota]
                                             Liatris aestivalis
                                             Liatris aspera
                                                   [Lacinaria aspera]
                                                   [Liatris aspera var. intermedia]
                                                   [Liatris aspera var. salutans]
                                               Liatris aspera var. aspera
                                                     [Lacinaria aspera]
                                             Liatris boykinii
                                                   [Lacinaria boykinii]
                                             Liatris bracteata
                                             Liatris chapmanii
                                                   [Lacinaria chapmanii]
                                             Liatris cokeri
                                                   [Liatris regimontis]
                                             Liatris compacta
                                                   [Liatris squarrosa var. compacta]
                                             Liatris cylindracea
                                                   [Lacinaria cylindracea]
                                             Liatris cymosa
                                             Liatris elegans
                                                   [Lacinaria elegans]
                                                   [Lacinaria flabellata]
                                                   [Liatris elegans f. flabellata]
                                                   [Liatris elegans var. flabellata]
                                               Liatris elegans var. carizzana
                                               Liatris elegans var. elegans
                                                     [Lacinaria elegans]
                                             Liatris elegantula
                                                   [Lacinaria elegantula]
                                                   [Liatris graminifolia var. elegantula]
                                                   [Liatris pilosa var. elegantula]
                                             Liatris fallacior
                                             Liatris freemaniana
                                             Liatris frostii
                                             Liatris garberi
                                                   [Lacinaria chlorolepis]
                                                   [Lacinaria garberi]
                                                   [Lacinaria nashii]
                                             Liatris gladewitzii
                                             Liatris glandulosa
                                             Liatris gracilis
                                                   [Lacinaria gracilis]
                                                   [Lacinaria laxa]
                                               Liatris gracilis var. gholsonii
                                                     [Liatris gholsonii]
                                             Liatris graminifolia
                                             Liatris helleri
                                                   [Lacinaria helleri]
                                                   [Liatris turgida]
                                             Liatris hirsuta
                                                   [Liatris squarrosa var. hirsuta]
                                             Liatris johnsonii
                                             Liatris laevigata
                                                   [Liatris tenuifolia var. laevigata]
                                             Liatris lancifolia
                                                   [Lacinaria lancifolia]
                                                   [Liatris kansana]
                                             Liatris ligulistylis
                                                   [Lacinaria ligulistylis]
                                             Liatris macdanieliana
                                             Liatris microcephala
                                                   [Lacinaria microcephala]
                                             Liatris ohlingerae
                                                   [Ammopursus ohlingerae]
                                             Liatris oligocephala
                                             Liatris orzellii
                                             Liatris patens
                                             Liatris pauciflora
                                                   [Lacinaria pauciflora]
                                                   [Lacinaria secunda]
                                                   [Liatris secunda]
                                               Liatris pauciflora var. secunda
                                                     [Lacinaria secunda]
                                                     [Liatris secunda]
                                             Liatris pilosa
                                                   [Lacinaria graminifolia]
                                                   [Lacinaria pilosa]
                                                   [Liatris graminifolia var. dubia]
                                                   [Liatris graminifolia var. lasia]
                                                   [Liatris pilosa var. lasia]
                                               Liatris pilosa var. pilosa
                                             Liatris provincialis
                                             Liatris punctata
                                                   [Lacinaria punctata]
                                                   [Liatris densispicata var. densispicata]
                                                   [Liatris densispicata]
                                                   [Liatris punctata var. nebraskana]
                                               Liatris punctata var. mexicana
                                               Liatris punctata var. mucronata
                                                     [Lacinaria ruthii]
                                                     [Liatris angustifolia]
                                                     [Liatris mucronata]
                                               Liatris punctata var. punctata
                                                     [Lacinaria punctata]
                                                     [Liatris punctata var. typica]
                                             Liatris pycnostachya
                                                   [Lacinaria pycnostachya]
                                                   [Liatris bebbiana]
                                               Liatris pycnostachya var. lasiophylla
                                               Liatris pycnostachya var. pycnostachya
                                                     [Lacinaria pycnostachya]
                                                     [Liatris bebbiana]
                                             Liatris quadriflora
                                                   [Liatris tenuifolia var. quadriflora]
                                             Liatris ridgwayi
                                             Liatris scariosa
                                                   [Lacinaria scariosa]
                                                   [Liatris scariosa var. virginiana]
                                               Liatris scariosa var. nieuwlandii
                                                     [Lacinaria scariosa var. nieuwlandii]
                                                     [Liatris borealis]
                                                     [Liatris nieuwlandii]
                                                     [Liatris novae-angliae var. nieuwlandii]
                                               Liatris scariosa var. novae-angliae
                                                     [Liatris borealis]
                                                     [Liatris novae-angliae]
                                               Liatris scariosa var. novaeangliae
                                                     [Liatris novae-angliae]
                                               Liatris scariosa var. scariosa
                                                     [Lacinaria scariosa]
                                                     [Liatris scariosa var. virginiana]
                                             Liatris spheroidea
                                                   [Lacinaria aspera var. spheroidea]
                                             Liatris spicata
                                                   [Lacinaria spicata]
                                               Liatris spicata var. glabrata
                                                     [Liatris glabrata]
                                               Liatris spicata var. resinosa
                                               Liatris spicata var. savannensis
                                                     [Liatris savannensis]
                                               Liatris spicata var. spicata
                                                     [Lacinaria spicata]
                                             Liatris squarrosa
                                                   [Lacinaria squarrosa]
                                                   [Liatris glabrata var. alabamensis]
                                                   [Liatris squarrosa var. alabamensis]
                                                   [Liatris squarrosa var. gracilenta]
                                               Liatris squarrosa var. glabrata
                                                     [Liatris glabrata]
                                               Liatris squarrosa var. squarrosa
                                                     [Lacinaria squarrosa]
                                                     [Liatris squarrosa var. gracilenta]
                                             Liatris squarrulosa
                                                   [Lacinaria ruthii]
                                                   [Lacinaria shortii]
                                                   [Lacinaria tracyi]
                                                   [Liatris earlei]
                                                   [Liatris scabra]
                                                   [Liatris scariosa var. squarrulosa]
                                             Liatris steelei
                                             Liatris tenuifolia
                                                   [Lacinaria tenuifolia]
                                               Liatris tenuifolia var. tenuifolia
                                                     [Lacinaria tenuifolia]
                                             Liatris tenuis
                                             Liatris virgata
                                                   [Lacinaria regimontis]
                                                   [Lacinaria smallii]
                                                   [Liatris graminifolia var. racemosa]
                                                   [Liatris graminifolia var. smallii]
                                                   [Liatris graminifolia var. virgata]
                                                   [Liatris regimontis]
                                                   [Liatris spicata var. racemosa]
                                             Liatris weaveri
                                     Lidbeckia
                                     Lidia
                                     Ligularia
                                             Ligularia dentata
                                                   [Senecio clivorum]
                                               Ligularia dentata subsp. dentata
                                                     [Senecio clivorum]
                                     Lindheimera
                                             Lindheimera texana
                                     Lipochaeta
                                             Lipochaeta connata
                                               Lipochaeta connata subsp. acris
                                                     [Lipochaeta acris]
                                                     [Lipochaeta connata var. acris]
                                                     [Lipochaeta lobata var. incisior]
                                               Lipochaeta connata subsp. connata
                                                     [Lipochaeta alata var. acrior]
                                                     [Lipochaeta alata var. pulchrior]
                                                     [Lipochaeta alata]
                                                     [Lipochaeta profusa var. robustior]
                                                     [Lipochaeta profusa]
                                               Lipochaeta connata var. connata
                                                     [Lipochaeta alata var. acrior]
                                                     [Lipochaeta alata var. pulchrior]
                                                     [Lipochaeta alata]
                                                     [Lipochaeta profusa var. robustior]
                                                     [Lipochaeta profusa]
                                             Lipochaeta degeneri
                                             Lipochaeta heterophylla
                                                   [Lipochaeta hastata]
                                                   [Lipochaeta heterophylla var. molokaiensis]
                                             Lipochaeta lobata
                                               Lipochaeta lobata subsp. leptophylla
                                                     [Lipochaeta lobata var. leptophylla]
                                               Lipochaeta lobata subsp. lobata
                                                     [Lipochaeta calycosa]
                                                     [Lipochaeta christophersenii]
                                                     [Lipochaeta garberi]
                                                     [Lipochaeta kaenaensis]
                                                     [Lipochaeta lobata var. albescens]
                                                     [Lipochaeta lobata var. aprevalliana]
                                                     [Lipochaeta lobata var. denticulata]
                                                     [Lipochaeta lobata var. grossedentata]
                                                     [Lipochaeta lobata var. hastulata]
                                                     [Lipochaeta lobata var. hastulatoides]
                                                     [Lipochaeta lobata var. hosakae]
                                                     [Lipochaeta niihauensis]
                                                     [Lipochaeta trilobata]
                                                     [Lipochaeta vittata]
                                               Lipochaeta lobata var. lobata
                                                     [Lipochaeta calycosa]
                                                     [Lipochaeta christophersenii]
                                                     [Lipochaeta garberi]
                                                     [Lipochaeta kaenaensis]
                                                     [Lipochaeta lobata var. albescens]
                                                     [Lipochaeta lobata var. aprevalliana]
                                                     [Lipochaeta lobata var. denticulata]
                                                     [Lipochaeta lobata var. grossedentata]
                                                     [Lipochaeta lobata var. hastulata]
                                                     [Lipochaeta lobata var. hastulatoides]
                                                     [Lipochaeta lobata var. hosakae]
                                                     [Lipochaeta niihauensis]
                                                     [Lipochaeta trilobata]
                                                     [Lipochaeta vittata]
                                             Lipochaeta procumbens
                                             Lipochaeta rockii
                                                   [Lipochaeta elliptica]
                                                   [Lipochaeta forbesii var. sherffii]
                                                   [Lipochaeta forbesii]
                                                   [Lipochaeta heterophylla var. malvacea]
                                                   [Lipochaeta kahoolawensis]
                                                   [Lipochaeta lobata var. makenensis]
                                                   [Lipochaeta lobata var. maunaloensis]
                                                   [Lipochaeta mauiensis]
                                                   [Lipochaeta nesophila]
                                                   [Lipochaeta rockii var. dissecta]
                                                   [Lipochaeta rockii var. parva]
                                                   [Lipochaeta rockii var. subovata]
                                                   [Lipochaeta scabra]
                                                   [Lipochaeta succulenta var. trifida]
                                             Lipochaeta succulenta
                                                   [Lipochaeta connata var. decurrens]
                                                   [Lipochaeta connata var. littoralis]
                                                   [Lipochaeta lanceolata]
                                                   [Lipochaeta robusta]
                                                   [Lipochaeta succulenta var. angustata]
                                                   [Lipochaeta succulenta var. barclayi]
                                                   [Lipochaeta succulenta var. decurrens]
                                                   [Lipochaeta variolosa]
                                     Logfia
                                             Logfia arizonica
                                                   [Filago arizonica]
                                                   [Oglifa arizonica]
                                             Logfia arvensis
                                                   [Filago arvensis]
                                                   [Gnaphalium arvense]
                                                   [Oglifa arvensis]
                                             Logfia californica
                                                   [Filago californica]
                                                   [Oglifa californica]
                                             Logfia depressa
                                                   [Filago depressa]
                                                   [Oglifa depressa]
                                             Logfia gallica
                                                   [Filago gallica]
                                                   [Oglifa gallica]
                                             Logfia minima
                                                   [Oglifa minima]
                                     Lorandersonia
                                             Lorandersonia baileyi
                                                   [Chrysothamnus baileyi]
                                                   [Chrysothamnus pulchellus subsp. baileyi]
                                                   [Chrysothamnus pulchellus var. baileyi]
                                                   [Ericameria pulchella subsp. baileyi]
                                             Lorandersonia linifolia
                                                   [Chrysothamnus linifolius]
                                                   [Chrysothamnus viscidiflorus subsp. linifolius]
                                                   [Chrysothamnus viscidiflorus var. linifolius]
                                                   [Ericameria linifolia]
                                             Lorandersonia microcephala
                                                   [Haplopappus microcephalus]
                                                   [Tonestus microcephalus]
                                             Lorandersonia peirsonii
                                                   [Haplopappus eximius subsp. peirsonii]
                                                   [Haplopappus peirsonii]
                                                   [Tonestus peirsonii]
                                             Lorandersonia pulchella
                                                   [Chrysothamnus pulchellus subsp. elatior]
                                                   [Chrysothamnus pulchellus]
                                                   [Ericameria pulchella var. elatior]
                                                   [Ericameria pulchella]
                                             Lorandersonia salicina
                                                   [Haplopappus salicinus]
                                                   [Hesperodoria salicina]
                                             Lorandersonia spathulata
                                                   [Chrysothamnus spathulatus]
                                                   [Chrysothamnus viscidiflorus var. ludens]
                                                   [Ericameria spathulata]
                                     Luina
                                             Luina hypoleuca
                                             Luina serpentina
                                     Lygodesmia
                                             Lygodesmia aphylla
                                             Lygodesmia exigua
                                                   [Prenanthella exigua]
                                             Lygodesmia grandiflora
                                                   [Erythremia grandiflora]
                                                   [Lygodesmia grandiflora var. stricta]
                                               Lygodesmia grandiflora var. arizonica
                                                     [Lygodesmia arizonica]
                                               Lygodesmia grandiflora var. dianthopsis
                                                     [Lygodesmia dianthopsis]
                                               Lygodesmia grandiflora var. doloresensis
                                                     [Lygodesmia doloresensis]
                                               Lygodesmia grandiflora var. entrada
                                                     [Lygodesmia entrada]
                                             Lygodesmia juncea
                                                   [Lygodesmia juncea/Stephanomeria pauciflora]
                                             Lygodesmia ramosissima
                                             Lygodesmia texana
                                                   [Lygodesmia aphylla var. texana]
                                     Machaeranthera
                                             Machaeranthera tagetina
                                                   [Aster tagetinus]
                                             Machaeranthera tanacetifolia
                                                   [Aster tanacetifolius]
                                                   [Machaeranthera coronopifolia]
                                                   [Machaeranthera parthenium]
                                                   [Machaeranthera pinnatifida/tanacetifolia]
                                     Madia
                                             Madia anomala
                                             Madia citrigracilis
                                             Madia citriodora
                                             Madia elegans
                                                   [Madia elegans subsp. densifolia]
                                                   [Madia elegans subsp. vernalis]
                                                   [Madia elegans subsp. wheeleri]
                                                   [Madia elegans var. densifolia]
                                               Madia elegans subsp. elegans
                                             Madia exigua
                                             Madia glomerata
                                             Madia gracilis
                                                   [Madia dissitiflora]
                                                   [Madia gracilis subsp. collina]
                                                   [Madia gracilis subsp. pilosa]
                                             Madia madioides
                                             Madia radiata
                                             Madia sativa
                                                   [Madia capitata]
                                                   [Madia sativa subsp. capitata]
                                                   [Madia sativa subsp. congesta]
                                                   [Madia sativa var. congesta]
                                             Madia subspicata
                                     Malacothrix
                                             Malacothrix californica
                                             Malacothrix clevelandii
                                                   [Malacothrix senecioides]
                                             Malacothrix coulteri
                                                   [Malacothrix coulteri var. cognata]
                                                   [Zollikoferia elquiensis]
                                             Malacothrix fendleri
                                             Malacothrix floccifera
                                                   [Malacothrix obtusa]
                                                   [Malacothrix parviflora]
                                                   [Malacothrix senecioides]
                                                   [Senecio flocciferus]
                                             Malacothrix foliosa
                                               Malacothrix foliosa subsp. crispifolia
                                                     [Malacothrix crispifolia]
                                               Malacothrix foliosa subsp. foliosa
                                                     [Malacothrix insularis]
                                               Malacothrix foliosa subsp. philbrickii
                                               Malacothrix foliosa subsp. polycephala
                                                     [Malacothrix polycephala]
                                             Malacothrix glabrata
                                                   [Malacothrix californica var. glabrata]
                                             Malacothrix incana
                                                   [Malacothrix incana var. succulenta]
                                                   [Malacothrix succulenta]
                                             Malacothrix indecora
                                                   [Malacothrix foliosa var. indecora]
                                             Malacothrix junakii
                                             Malacothrix phaeocarpa
                                             Malacothrix saxatilis
                                               Malacothrix saxatilis var. arachnoidea
                                                     [Malacothrix arachnoidea]
                                               Malacothrix saxatilis var. commutata
                                               Malacothrix saxatilis var. implicata
                                                     [Malacothrix implicata]
                                               Malacothrix saxatilis var. saxatilis
                                               Malacothrix saxatilis var. tenuifolia
                                                     [Malacothrix altissima]
                                                     [Malacothrix saxatilis var. altissima]
                                                     [Malacothrix saxatilis var. tenuissima]
                                                     [Malacothrix tenuifolia]
                                             Malacothrix similis
                                             Malacothrix sonchoides
                                                   [Leptoseris sonchoides]
                                             Malacothrix sonorae
                                             Malacothrix squalida
                                                   [Malacothrix foliosa var. squalida]
                                                   [Malacothrix insularis var. squalida]
                                             Malacothrix stebbinsii
                                                   [Malacothrix clevelandii var. stebbinsii]
                                             Malacothrix torreyi
                                                   [Malacothrix sonchoides var. torreyi]
                                     Malperia
                                             Malperia tenuis
                                     Mantisalca
                                             Mantisalca salmantica
                                                   [Centaurea salmantica]
                                     Marshallia
                                             Marshallia caespitosa
                                                   [Marshallia caespitosa var. signata]
                                               Marshallia caespitosa var. caespitosa
                                             Marshallia graminifolia
                                               Marshallia graminifolia subsp. graminifolia
                                                     [Marshallia laciniarioides]
                                                     [Marshallia tenuifolia var. graminifolia]
                                                     [Marshallia williamsonii]
                                               Marshallia graminifolia subsp. tenuifolia
                                                     [Marshallia tenuifolia]
                                               Marshallia graminifolia var. cynanthera
                                                     [Marshallia tenuifolia]
                                               Marshallia graminifolia var. graminifolia
                                                     [Marshallia laciniarioides]
                                                     [Marshallia tenuifolia var. graminifolia]
                                                     [Marshallia williamsonii]
                                             Marshallia grandiflora
                                             Marshallia legrandii
                                             Marshallia mohrii
                                             Marshallia obovata
                                                   [Marshallia obovata var. platyphylla]
                                                   [Marshallia obovata var. scaposa]
                                               Marshallia obovata var. obovata
                                                     [Marshallia obovata var. platyphylla]
                                             Marshallia ramosa
                                             Marshallia trinervia
                                     Matricaria
                                             Matricaria ambigua
                                             Matricaria chamomilla
                                                   [Chamomilla recutita]
                                                   [Matricaria chamomilla var. coronata]
                                                   [Matricaria courrantiana]
                                                   [Matricaria recutita]
                                             Matricaria discoidea
                                                   [Artemisia matricarioides]
                                                   [Chamomilla suaveolens]
                                                   [Lepidanthus suaveolens]
                                                   [Lepidotheca suaveolens]
                                                   [Matricaria matricarioides]
                                                   [Santolina suaveolens]
                                                   [Tanacetum suaveolens]
                                             Matricaria occidentalis
                                                   [Chamomilla occidentalis]
                                             Matricaria suaveolens
                                     Maxia
                                     Maximowiczia
                                     Medranoa
                                             Medranoa palmeri
                                                   [Aster palmeri]
                                                   [Ericameria austrotexana]
                                                   [Xylothamia palmeri]
                                     Melampodium
                                             Melampodium cinereum
                                                   [Melampodium cinereum var. hirtellum]
                                                   [Melampodium cinereum var. ramosissimum]
                                               Melampodium cinereum var. cinereum
                                             Melampodium divaricatum
                                                   [Dysodium divaricatum]
                                             Melampodium leucanthum
                                             Melampodium longicorne
                                             Melampodium perfoliatum
                                                   [Alcina perfoliata]
                                             Melampodium sericeum
                                                   [Melampodium hispidum]
                                             Melampodium strigosum
                                     Melanthera
                                             Melanthera angustifolia
                                             Melanthera aspera
                                               Melanthera aspera var. aspera
                                                     [Calea aspera]
                                                     [Melanthera canescens]
                                                     [Melanthera deltoidea]
                                                     [Melanthera montana]
                                             Melanthera nivea
                                                   [Bidens nivea]
                                                   [Calea aspera]
                                                   [Melanthera aspera var. glabriuscula]
                                                   [Melanthera calcicola]
                                                   [Melanthera canescens]
                                                   [Melanthera carpenteri]
                                                   [Melanthera confusa]
                                                   [Melanthera deltoidea]
                                                   [Melanthera hastata]
                                                   [Melanthera ligulata]
                                                   [Melanthera montana]
                                             Melanthera parvifolia
                                                   [Melanthera radiata]
                                     Melanthium
                                     Micropsis
                                             Micropsis dasycarpa
                                                   [Micropus dasycarpa]
                                     Micropteryx
                                     Micropus
                                     Micropyxis
                                     Microrhamnus
                                     Microseris
                                             Microseris acuminata
                                             Microseris alpestris
                                                   [Nothocalais alpestris]
                                             Microseris bigelovii
                                             Microseris borealis
                                                   [Apargidium boreale]
                                             Microseris campestris
                                             Microseris cuspidata
                                                   [Agoseris cuspidata]
                                                   [Nothocalais cuspidata]
                                             Microseris decipiens
                                                   [Stebbinsoseris decipiens]
                                             Microseris douglasii
                                               Microseris douglasii subsp. douglasii
                                               Microseris douglasii subsp. platycarpha
                                                     [Microseris douglasii var. platycarpha]
                                               Microseris douglasii subsp. tenella
                                             Microseris elegans
                                             Microseris heterocarpa
                                                   [Stebbinsoseris heterocarpa]
                                             Microseris howellii
                                             Microseris laciniata
                                               Microseris laciniata subsp. detlingii
                                               Microseris laciniata subsp. laciniata
                                                     [Scorzonella laciniata var. pratensis]
                                                     [Scorzonella laciniata]
                                                     [Scorzonella procera]
                                               Microseris laciniata subsp. leptosepala
                                                     [Scorzonella laciniata var. bolanderi]
                                                     [Scorzonella leachiana]
                                                     [Scorzonella leptosepala]
                                               Microseris laciniata subsp. siskiyouensis
                                                     [Microseris nutans subsp. siskiyouensis]
                                             Microseris lindleyi
                                                   [Microseris linearifolia]
                                                   [Uropappus lindleyi]
                                                   [Uropappus linearifolius]
                                             Microseris nigrescens
                                                   [Nothocalais nigrescens]
                                             Microseris nutans
                                                   [Ptilocalais nutans]
                                                   [Scorzonella nutans var. major]
                                                   [Scorzonella nutans]
                                             Microseris paludosa
                                             Microseris sylvatica
                                             Microseris troximoides
                                                   [Nothocalais troximoides]
                                                   [Scorzonella troximoides]
                                     Mikania
                                             Mikania congesta
                                             Mikania cordifolia
                                                   [Cacalia cordifolia]
                                                   [Willoughbya halei]
                                             Mikania fragilis
                                             Mikania micrantha
                                                   [Mikania batatifolia]
                                                   [Willoughbya heterophylla]
                                             Mikania odoratissima
                                             Mikania pachyphylla
                                             Mikania phaeoclados
                                                   [Eupatorium clematideum]
                                             Mikania porosa
                                             Mikania scandens
                                                   [Mikania angulosa]
                                                   [Mikania batatifolia]
                                                   [Mikania scandens var. pubescens]
                                                   [Willoughbya heterophylla]
                                             Mikania stevensiana
                                     Monolopia
                                             Monolopia congdonii
                                                   [Eatonella congdonii]
                                                   [Lembertia congdonii]
                                             Monolopia gracilens
                                             Monolopia lanceolata
                                             Monolopia major
                                             Monolopia stricta
                                     Monoptilon
                                             Monoptilon bellidiforme
                                             Monoptilon bellioides
                                     Montanoa
                                             Montanoa hibiscifolia
                                                   [Montagnaea hibiscifolia]
                                     Munzothamnus
                                             Munzothamnus blairii
                                                   [Malacothrix blairii]
                                                   [Stephanomeria blairii]
                                     Mycelis
                                     Myginda
                                     Nabalus
                                             Nabalus alatus
                                                   [Prenanthes alata]
                                             Nabalus albus
                                             Nabalus altissima
                                                   [Prenanthes alba]
                                                   [Prenanthes altissima var. cinnamomea]
                                             Nabalus asper
                                                   [Prenanthes aspera]
                                             Nabalus autumnalis
                                                   [Nabalus virgatus]
                                                   [Prenanthes autumnalis]
                                             Nabalus barbata
                                                   [Prenanthes barbata]
                                             Nabalus boottii
                                                   [Prenanthes boottii]
                                             Nabalus racemosus
                                                   [Prenanthes racemosa subsp. multiflora]
                                                   [Prenanthes racemosa subsp. racemosa]
                                                   [Prenanthes racemosa var. multiflora]
                                                   [Prenanthes racemosa var. pinnatifida]
                                                   [Prenanthes racemosa var. racemosa]
                                                   [Prenanthes racemosa]
                                             Nabalus roanensis
                                                   [Nabalus cylindricus]
                                                   [Prenanthes roanensis]
                                             Nabalus sagittatus
                                                   [Prenanthes alata var. sagittata]
                                                   [Prenanthes sagittata]
                                             Nabalus serpentarius
                                                   [Nabalus integrifolius]
                                                   [Prenanthes crepidinea]
                                                   [Prenanthes integrifolia]
                                                   [Prenanthes serpentaria]
                                             Nabalus trifoliolatus
                                                   [Prenanthes trifoliolata]
                                               Nabalus trifoliolatus var. nanus
                                                     [Nabalus nanus]
                                                     [Prenanthes nana]
                                                     [Prenanthes trifoliolata var. nana]
                                     Nahuatlea
                                             Nahuatlea hypoleuca
                                                   [Gochnatia hypoleuca]
                                     Neomirandea
                                             Neomirandea angularis
                                                   [Eupatorium fistulosum]
                                     Nestotus
                                             Nestotus stenophyllus
                                                   [Haplopappus stenophyllus]
                                                   [Stenotus stenophyllus]
                                     Neurolaena
                                             Neurolaena lobata
                                                   [Conyza lobata]
                                                   [Pluchea symphytifolia symphytifolia]
                                                   [Pluchea symphytifolia]
                                     Nicolletia
                                             Nicolletia edwardsii
                                             Nicolletia occidentalis
                                     Nicoteba
                                     Nipponanthemum
                                             Nipponanthemum nipponicum
                                                   [Leucanthemum nipponicum]
                                     Nocca
                                     Nothocalais
                                     Noticastrum
                                             Noticastrum adscendens
                                                   [Aster adscendens]
                                     Oclemena
                                             Oclemena acuminata
                                                   [Aster acuminatus var. magdalenensis]
                                                   [Aster acuminatus]
                                             Oclemena blakei
                                                   [Aster blakei]
                                             Oclemena nemoralis
                                                   [Aster nemoralis]
                                             Oclemena reticulata
                                                   [Aster reticulatus]
                                                   [Doellingeria reticulata]
                                     Oedera
                                     Olearia
                                             Olearia pinifolia
                                                   [Aster pinifolius]
                                     Oligoneuron
                                             Oligoneuron bernardii
                                                   [Solidago bernardii]
                                             Oligoneuron corymbosum
                                             Oligoneuron krotkovii
                                                   [Solidago krotkovii]
                                             Oligoneuron lutescens
                                                   [Aster lutescens]
                                                   [Aster ptarmicoides var. lutescens]
                                                   [Diplopappus lutescens]
                                                   [Unamia lutescens]
                                     Oligosporus
                                             Oligosporus filifolius
                                             Oligosporus pedatifidus
                                     Omalotheca
                                             Omalotheca supina
                                                   [Gnaphalium supinum]
                                             Omalotheca sylvatica
                                                   [Gnaphalium sylvaticum]
                                     Oncosiphon
                                             Oncosiphon grandiflorum
                                                   [Matricaria grandiflora]
                                             Oncosiphon piluliferum
                                                   [Matricaria globifera]
                                             Oncosiphon suffruticosum
                                                   [Matricaria suffruticosa]
                                     Onopordum
                                             Onopordum acanthium
                                               Onopordum acanthium subsp. acanthium
                                             Onopordum illyricum
                                             Onopordum tauricum
                                     Oonopsis
                                             Oonopsis engelmannii
                                                   [Haplopappus engelmannii]
                                             Oonopsis foliosa
                                                   [Haplopappus fremontii]
                                                   [Machaeranthera fremontii]
                                               Oonopsis foliosa var. foliosa
                                                     [Haplopappus fremontii subsp. typicus]
                                                     [Haplopappus fremontii]
                                               Oonopsis foliosa var. monocephala
                                                     [Haplopappus fremontii subsp. monocephalus]
                                             Oonopsis multicaulis
                                                   [Haplopappus multicaulis]
                                             Oonopsis wardii
                                                   [Haplopappus fremontii subsp. wardii]
                                                   [Haplopappus wardii]
                                     Oreochrysum
                                             Oreochrysum parryi
                                                   [Aster minor]
                                                   [Haplopappus parryi]
                                                   [Solidago parryi]
                                     Oreostemma
                                             Oreostemma alpigenum
                                                   [Aster alpigenus]
                                                   [Haplopappus alpigenus]
                                               Oreostemma alpigenum var. alpigenum
                                                     [Aster alpigenus]
                                                     [Haplopappus alpigenus]
                                               Oreostemma alpigenum var. andersonii
                                                     [Aster alpigenus subsp. andersonii]
                                                     [Aster alpigenus var. andersonii]
                                                     [Erigeron andersonii]
                                               Oreostemma alpigenum var. haydenii
                                                     [Aster alpigenus subsp. haydenii]
                                                     [Aster alpigenus var. haydenii]
                                                     [Aster haydenii]
                                                     [Oreostemma alpigenum subsp. haydenii]
                                             Oreostemma elatum
                                                   [Aster elatus]
                                                   [Oreastrum elatum]
                                             Oreostemma peirsonii
                                                   [Aster peirsonii]
                                     Oritrophium
                                             Oritrophium nevadense
                                                   [Erigeron nevadensis]
                                             Oritrophium repens
                                                   [Erigeron repens]
                                     Orochaenactis
                                             Orochaenactis thysanocarpha
                                     Osmadenia
                                             Osmadenia tenella
                                                   [Calycadenia tenella]
                                                   [Hemizonia tenella]
                                     Osmia
                                     Osteospermum
                                             Osteospermum calendulaceum
                                             Osteospermum ecklonis
                                                   [Dimorphotheca ecklonis]
                                             Osteospermum fruticosum
                                     Oxytenia
                                     Packera
                                             Packera actinella
                                                   [Senecio actinella var. mogollonicus]
                                                   [Senecio actinella]
                                             Packera anonyma
                                                   [Senecio anonymus]
                                                   [Senecio smallii]
                                             Packera antennariifolia
                                                   [Senecio antennariifolius]
                                             Packera aurea
                                                   [Senecio aureus var. aquilonius]
                                                   [Senecio aureus var. gracilis]
                                                   [Senecio aureus var. intercursus]
                                                   [Senecio aureus]
                                                   [Senecio gracilis]
                                             Packera bernardina
                                                   [Senecio bernardinus]
                                                   [Senecio ionophyllus var. sparsilobatus]
                                             Packera bolanderi
                                                   [Senecio bolanderi]
                                               Packera bolanderi var. bolanderi
                                                     [Senecio bolanderi]
                                               Packera bolanderi var. harfordii
                                                     [Senecio bolanderi var. harfordii]
                                                     [Senecio harfordii]
                                             Packera breweri
                                                   [Senecio breweri]
                                             Packera cana
                                                   [Senecio canus]
                                                   [Senecio convallium]
                                                   [Senecio hallii var. discoidea]
                                                   [Senecio harbourii]
                                                   [Senecio howellii]
                                                   [Senecio purshianus]
                                             Packera cardamine
                                                   [Senecio cardamine]
                                             Packera castoreus
                                                   [Senecio castoreus]
                                             Packera clevelandii
                                                   [Senecio clevelandii var. heterophyllus]
                                               Packera clevelandii var. heterophylla
                                                     [Senecio clevelandii var. heterophyllus]
                                             Packera contermina
                                                   [Senecio conterminus]
                                             Packera crawfordii
                                                   [Senecio crawfordii]
                                                   [Senecio pauperculus subsp. crawfordii]
                                                   [Senecio pauperculus var. crawfordii]
                                             Packera crocata
                                                   [Senecio crocatus var. wolfii]
                                                   [Senecio crocatus]
                                             Packera cymbalaria
                                                   [Packera fernaldii]
                                                   [Packera resedifolia]
                                                   [Senecio cymbalaria]
                                                   [Senecio resedifolius]
                                             Packera cynthioides
                                                   [Senecio cynthioides]
                                                   [Senecio wrightii]
                                             Packera debilis
                                                   [Senecio debilis]
                                                   [Senecio fedifolius]
                                             Packera dimorphophylla
                                                   [Senecio dimorphophyllus]
                                                   [Senecio heterodoxus]
                                               Packera dimorphophylla subsp. dimorphophylla
                                               Packera dimorphophylla var. dimorphophylla
                                                     [Senecio dimorphophyllus]
                                                     [Senecio heterodoxus]
                                               Packera dimorphophylla var. intermedia
                                                     [Packera dimorphophylla subsp. intermedia]
                                                     [Senecio dimorphophyllus subsp. intermedius]
                                                     [Senecio dimorphophyllus var. intermedius]
                                               Packera dimorphophylla var. paysonii
                                                     [Senecio dimorphophyllus var. paysonii]
                                             Packera eurycephala
                                                   [Senecio eurycephalus]
                                               Packera eurycephala var. eurycephala
                                                     [Senecio eurycephalus]
                                               Packera eurycephala var. lewisrosei
                                                     [Senecio eurycephalus var. lewisrosei]
                                                     [Senecio lewisrosei]
                                             Packera fendleri
                                                   [Senecio fendleri var. lanatus]
                                                   [Senecio fendleri]
                                             Packera flettii
                                                   [Senecio flettii]
                                             Packera franciscana
                                                   [Senecio franciscanus]
                                             Packera ganderi
                                                   [Senecio ganderi]
                                             Packera glabella
                                                   [Senecio glabellus]
                                                   [Senecio lobatus]
                                             Packera greenei
                                                   [Senecio greenei]
                                             Packera hartiana
                                                   [Packera quaerens]
                                                   [Senecio hartianus]
                                                   [Senecio quaerens]
                                             Packera hesperia
                                                   [Senecio hesperius]
                                             Packera heterophylla
                                             Packera hyperborealis
                                                   [Senecio hyperborealis]
                                             Packera indecora
                                                   [Senecio indecorus]
                                                   [Senecio pauciflorus var. fallax]
                                             Packera insulae-regalis
                                             Packera ionophylla
                                                   [Senecio ionophyllus]
                                             Packera layneae
                                                   [Senecio layneae]
                                             Packera macounii
                                                   [Senecio ligulifolius]
                                                   [Senecio macounii]
                                             Packera malmstenii
                                                   [Senecio malmstenii]
                                             Packera mancosana
                                             Packera memmingeri
                                                   [Senecio memmingeri]
                                             Packera millefolia
                                                   [Senecio millefolium]
                                             Packera millefolium
                                                   [Senecio memmingeri]
                                                   [Senecio millefolium]
                                             Packera millelobata
                                                   [Senecio millelobatus]
                                             Packera multilobata
                                                   [Senecio lynceus var. leucoreus]
                                                   [Senecio lynceus]
                                                   [Senecio multilobatus]
                                                   [Senecio stygius]
                                                   [Senecio thornberi]
                                             Packera musiniensis
                                                   [Senecio musiniensis]
                                             Packera neomexicana
                                                   [Senecio eurypterus]
                                                   [Senecio neomexicanus var. griffithsii]
                                                   [Senecio neomexicanus]
                                                   [Senecio oresbius]
                                               Packera neomexicana var. metcalfei
                                                     [Senecio metcalfei]
                                                     [Senecio neomexicanus var. metcalfei]
                                               Packera neomexicana var. mutabilis
                                                     [Senecio metcalfei]
                                                     [Senecio mutabilis]
                                                     [Senecio neomexicanus var. metcalfei]
                                                     [Senecio neomexicanus var. mutabilis]
                                               Packera neomexicana var. neomexicana
                                                     [Senecio eurypterus]
                                                     [Senecio neomexicanus var. griffithsii]
                                                     [Senecio neomexicanus]
                                                     [Senecio oresbius]
                                                     [Senecio thurberi]
                                               Packera neomexicana var. toumeyi
                                                     [Senecio neomexicanus var. toumeyi]
                                                     [Senecio toumeyi]
                                             Packera obovata
                                                   [Senecio obovatus var. elliottii]
                                                   [Senecio obovatus var. rotundus]
                                                   [Senecio obovatus]
                                                   [Senecio rotundus]
                                             Packera ogotorukensis
                                                   [Senecio ogotorukensis]
                                             Packera pauciflora
                                                   [Senecio discoideus]
                                             Packera paupercula
                                                   [Senecio balsamitae]
                                                   [Senecio crawfordii]
                                                   [Senecio gaspensis var. firmifolius]
                                                   [Senecio gaspensis]
                                                   [Senecio pauperculus var. balsamitae]
                                                   [Senecio pauperculus var. crawfordii]
                                                   [Senecio pauperculus var. firmifolius]
                                                   [Senecio pauperculus var. neoscoticus]
                                                   [Senecio pauperculus var. praelongus]
                                                   [Senecio pauperculus var. thompsoniensis]
                                                   [Senecio pauperculus]
                                                   [Senecio tweedyi]
                                               Packera paupercula var. pseudotomentosa
                                                     [Senecio pseudotomentosus]
                                             Packera plattensis
                                                   [Senecio plattensis]
                                                   [Senecio pseudotomentosus]
                                             Packera porteri
                                                   [Ligularia porteri]
                                                   [Senecio porteri]
                                             Packera pseudaurea
                                               Packera pseudaurea subsp. pseudaurea
                                                     [Senecio pauciflorus var. jucundulus]
                                                     [Senecio pseudaureus]
                                               Packera pseudaurea var. flavula
                                                     [Packera pseudaurea subsp. flavula]
                                                     [Senecio flavulus]
                                                     [Senecio pseudaureus subsp. flavulus]
                                                     [Senecio pseudaureus var. flavulus]
                                               Packera pseudaurea var. pseudaurea
                                                     [Senecio pauciflorus var. jucundulus]
                                                     [Senecio pseudaureus]
                                               Packera pseudaurea var. semicordata
                                                     [Senecio aureus var. semicordatus]
                                                     [Senecio pseudaureus subsp. semicordatus]
                                                     [Senecio pseudaureus var. semicordatus]
                                                     [Senecio semicordatus]
                                             Packera quercetorum
                                                   [Senecio quercetorum]
                                             Packera sanguisorboides
                                                   [Senecio sanguisorboides]
                                             Packera schweinitziana
                                                   [Senecio robbinsii]
                                                   [Senecio schweinitzianus]
                                             Packera spellenbergii
                                                   [Senecio cliffordii]
                                                   [Senecio spellenbergii]
                                             Packera streptanthifolia
                                                   [Packera cymbalarioides]
                                                   [Packera oodes]
                                                   [Packera streptanthifolia var. rubricaulis]
                                                   [Senecio acutidens]
                                                   [Senecio adamsii]
                                                   [Senecio aureus var. borealis]
                                                   [Senecio cymbalarioides var. borealis]
                                                   [Senecio cymbalarioides var. suksdorfii]
                                                   [Senecio cymbalarioides]
                                                   [Senecio fulgens]
                                                   [Senecio jonesii]
                                                   [Senecio laetiflorus]
                                                   [Senecio leonardii]
                                                   [Senecio longipetiolatus]
                                                   [Senecio oodes]
                                                   [Senecio pammelii]
                                                   [Senecio platylobus]
                                                   [Senecio rubricaulis]
                                                   [Senecio streptanthifolius var. borealis]
                                                   [Senecio streptanthifolius var. kluanei]
                                                   [Senecio streptanthifolius var. laetiflorus]
                                                   [Senecio streptanthifolius var. oodes]
                                                   [Senecio streptanthifolius var. rubricaulis]
                                                   [Senecio streptanthifolius var. wallowensis]
                                                   [Senecio streptanthifolius]
                                                   [Senecio subcuneatus]
                                                   [Senecio suksdorfii]
                                                   [Senecio wardii]
                                               Packera streptanthifolia var. streptanthifolia
                                             Packera subnuda
                                                   [Packera buekii]
                                                   [Senecio cymbalarioides cymbalarioides]
                                                   [Senecio cymbalarioides]
                                                   [Senecio subnudus]
                                               Packera subnuda var. moresbiensis
                                                     [Packera moresbiensis]
                                                     [Senecio cymbalarioides subsp. moresbiensis]
                                                     [Senecio moresbiensis]
                                             Packera tampicana
                                                   [Senecio greggii]
                                                   [Senecio imparipinnatus]
                                                   [Senecio tampicanus]
                                             Packera thurberi
                                                   [Senecio thurberi]
                                             Packera tomentosa
                                                   [Senecio alabamensis]
                                                   [Senecio tomentosus]
                                             Packera tridenticulata
                                                   [Senecio acutidens]
                                                   [Senecio densus]
                                                   [Senecio manitobensis]
                                                   [Senecio tridenticulatus]
                                             Packera werneriifolia
                                                   [Packera werneriifolia var. alpina]
                                                   [Senecio aureus var. werneriifolius]
                                                   [Senecio molinarius]
                                                   [Senecio muirii]
                                                   [Senecio saxosus var. toiyabensis]
                                                   [Senecio saxosus]
                                                   [Senecio werneriifolius var. alpinus]
                                                   [Senecio werneriifolius var. incertus]
                                                   [Senecio werneriifolius]
                                     Padus
                                     Palafoxia
                                             Palafoxia arida
                                                   [Palafoxia arida var. gigantea]
                                                   [Palafoxia linearis var. gigantea]
                                               Palafoxia arida var. arida
                                             Palafoxia callosa
                                                   [Othake callosa]
                                                   [Palafoxia callosa var. bella]
                                                   [Polypteris callosa]
                                             Palafoxia feayi
                                             Palafoxia hookeriana
                                                   [Palafoxia hookeriana var. minor]
                                                   [Polypteris hookeriana]
                                                   [Polypteris sphacelata]
                                               Palafoxia hookeriana var. hookeriana
                                                     [Polypteris hookeriana]
                                             Palafoxia integrifolia
                                                   [Polypteris integrifolia]
                                             Palafoxia linearis
                                             Palafoxia reverchonii
                                             Palafoxia riograndensis
                                             Palafoxia rosea
                                                   [Palafoxia macrolepis]
                                                   [Palafoxia rosea var. ambigua]
                                                   [Palafoxia rosea var. macrolepis]
                                                   [Palafoxia texana var. macrolepis]
                                               Palafoxia rosea var. rosea
                                             Palafoxia sphacelata
                                                   [Othake sphacelata]
                                                   [Polypteris sphacelata]
                                             Palafoxia texana
                                                   [Palafoxia rosea var. papposa]
                                                   [Palafoxia texana var. ambigua]
                                               Palafoxia texana var. texana
                                                     [Palafoxia rosea var. papposa]
                                     Pallenis
                                             Pallenis maritima
                                     Palma
                                     Paltonium
                                     Parasenecio
                                             Parasenecio adenostyloides
                                             Parasenecio auriculata
                                                   [Cacalia auriculata]
                                                   [Cacalia kamtschatica]
                                                   [Koyamacalia auriculata]
                                             Parasenecio auriculatus
                                                   [Cacalia auriculata subsp. kamtschatica]
                                                   [Cacalia auriculata]
                                                   [Cacalia kamtschatica]
                                                   [Koyamacalia auriculata]
                                             Parasenecio kamtschaticus
                                                   [Cacalia auriculata subsp. kamtschatica]
                                     Parthenice
                                             Parthenice mollis
                                               Parthenice mollis var. mollis
                                     Parthenium
                                             Parthenium alpinum
                                                   [Bolophyta alpina]
                                             Parthenium argentatum
                                             Parthenium auriculatum
                                                   [Parthenium hispidum var. auriculatum]
                                                   [Parthenium integrifolium var. auriculatum]
                                             Parthenium confertum
                                                   [Parthenium hysterophorus var. lyratum]
                                                   [Parthenium lyratum]
                                               Parthenium confertum var. confertum
                                               Parthenium confertum var. divaricatum
                                               Parthenium confertum var. intermedium
                                               Parthenium confertum var. lyratum
                                                     [Parthenium hysterophorus var. lyratum]
                                                     [Parthenium lyratum]
                                               Parthenium confertum var. microcephalum
                                             Parthenium hispidum
                                                   [Parthenium integrifolium var. hispidum]
                                                   [Parthenium repens]
                                             Parthenium hysterophorus
                                                   [Parthenium lobatum]
                                             Parthenium incanum
                                             Parthenium integrifolium
                                                   [Parthenium integrifolium var. henryanum]
                                               Parthenium integrifolium var. integrifolium
                                                     [Parthenium integrifolium var. henryanum]
                                               Parthenium integrifolium var. mabryanum
                                                     [Parthenium radfordii]
                                             Parthenium ligulatum
                                                   [Bolophyta ligulata]
                                                   [Parthenium alpinum var. ligulatum]
                                             Parthenium tetraneuris
                                                   [Bolophyta tetraneuris]
                                                   [Parthenium alpinum var. tetraneuris]
                                     Pascalia
                                             Pascalia glauca
                                                   [Wedelia glauca]
                                     Pectis
                                             Pectis angustifolia
                                               Pectis angustifolia var. angustifolia
                                               Pectis angustifolia var. fastigiata
                                                     [Pectis texana]
                                               Pectis angustifolia var. tenella
                                                     [Pectis tenella]
                                             Pectis carthusianorum
                                             Pectis ciliaris
                                                   [Pectis portoricensis]
                                             Pectis cylindrica
                                                   [Pectis postrata var. cylindrica]
                                                   [Pectis prostrata var. cylindrica]
                                             Pectis elongata
                                                   [Pectis elongata var. floribunda]
                                                   [Pectis floribunda]
                                             Pectis filipes
                                               Pectis filipes var. subnuda
                                             Pectis floridana
                                             Pectis glaucescens
                                                   [Chthonia glaucescens]
                                                   [Pectis leptocephala]
                                             Pectis humifusa
                                             Pectis imberbis
                                             Pectis linearifolia
                                             Pectis linearis
                                                   [Pectis febrifuga]
                                             Pectis linifolia
                                               Pectis linifolia var. linifolia
                                             Pectis longipes
                                             Pectis papposa
                                               Pectis papposa var. grandis
                                               Pectis papposa var. papposa
                                             Pectis postrata
                                             Pectis prostrata
                                                   [Pectis multisetosa]
                                                   [Pectis portoricensis]
                                                   [Pectis prostrata var. urceolata]
                                             Pectis rusbyi
                                                   [Pectis palmeri]
                                             Pectis tenuicaulis
                                             Pectis uniaristata
                                     Pentachaeta
                                               Layia pentachaeta subsp. albida
                                             Pentachaeta alsinoides
                                                   [Chaetopappa alsinoides]
                                             Pentachaeta aurea
                                                   [Chaetopappa aurea]
                                                   [Pentachaeta orcuttii]
                                                   [Pentachaeta paleacea]
                                               Pentachaeta aurea subsp. allenii
                                               Pentachaeta aurea subsp. aurea
                                                     [Chaetopappa aurea]
                                                     [Pentachaeta orcuttii]
                                                     [Pentachaeta paleacea]
                                             Pentachaeta bellidiflora
                                                   [Chaetopappa bellidiflora]
                                                   [Pentachaeta exilis var. grayi]
                                             Pentachaeta exilis
                                               Pentachaeta exilis subsp. aeolica
                                               Pentachaeta exilis subsp. exilis
                                                     [Aphantochaeta exilis]
                                                     [Chaetopappa exilis]
                                                     [Pentachaeta aphantochaeta]
                                                     [Pentachaeta exilis var. aphantochaeta]
                                                     [Pentachaeta exilis var. discoidea]
                                             Pentachaeta fragilis
                                                   [Chaetopappa fragilis]
                                             Pentachaeta lyonii
                                                   [Chaetopappa lyonii]
                                               Thymophylla pentachaeta var. belenidium
                                                     [Dyssodia belenidium]
                                                     [Dyssodia pentachaeta var. belenidium]
                                                     [Dyssodia thurberi]
                                               Thymophylla pentachaeta var. hartwegii
                                                     [Dyssodia hartwegii]
                                                     [Dyssodia pentachaeta subsp. hartwegii]
                                                     [Dyssodia pentachaeta var. hartwegii]
                                               Thymophylla pentachaeta var. puberula
                                                     [Dyssodia pentachaeta var. puberula]
                                     Pentanema
                                             Pentanema albertoregelia
                                             Pentanema divaricatum
                                                   [Inula divaricata]
                                             Pentanema indicum
                                                   [Vicoa auriculata]
                                     Pentzia
                                             Pentzia incana
                                                   [Pentzia virgata]
                                     Perezia
                                             Perezia multiflora
                                               Perezia multiflora subsp. sonchifolia
                                                     [Perezia sonchifolia]
                                     Pericallis
                                             Pericallis cruenta
                                                   [Senecio cruentus]
                                                   [Senecio hybridus]
                                             Pericallis cuneata
                                             Pericallis hybrida
                                                   [Senecio cruentus]
                                                   [Senecio hybridus]
                                     Pericome
                                             Pericome caudata
                                                   [Pericome caudata var. glandulosa]
                                                   [Pericome glandulosa]
                                     Perityle
                                             Perityle aglossa
                                             Perityle ajoensis
                                             Perityle ambrosiifolia
                                             Perityle angustifolia
                                                   [Laphamia angustifolia subsp. laciniata]
                                                   [Laphamia angustifolia]
                                             Perityle bisetosa
                                                   [Laphamia bisetosa]
                                               Perityle bisetosa var. appressa
                                               Perityle bisetosa var. bisetosa
                                                     [Laphamia bisetosa]
                                               Perityle bisetosa var. scalaris
                                             Perityle cernua
                                                   [Laphamia cernua]
                                             Perityle ciliata
                                             Perityle cinerea
                                                   [Laphamia cinerea]
                                             Perityle cochisensis
                                                   [Laphamia cochisensis]
                                             Perityle congesta
                                                   [Laphamia congesta]
                                             Perityle coronopifolia
                                             Perityle dissecta
                                                   [Laphamia dissecta]
                                             Perityle emoryi
                                                   [Perityle emoryi var. nuda]
                                             Perityle fosteri
                                             Perityle gilensis
                                                   [Laphamia gilensis]
                                               Perityle gilensis var. gilensis
                                                     [Laphamia gilensis]
                                               Perityle gilensis var. salensis
                                                     [Laphamia gilensis subsp. longilobus]
                                             Perityle gracilis
                                                   [Laphamia fastigiata]
                                                   [Laphamia gracilis]
                                                   [Perityle fastigiata]
                                             Perityle huecoensis
                                             Perityle intricata
                                                   [Laphamia intricata]
                                                   [Laphamia megalocephala subsp. intricata]
                                                   [Perityle megalocephala var. intricata]
                                             Perityle inyoensis
                                                   [Laphamia inyoensis]
                                             Perityle lemmonii
                                             Perityle lindheimeri
                                                   [Laphamia halimifolia subsp. lindheimeri]
                                                   [Laphamia rotundata]
                                                   [Perityle rotundata]
                                               Perityle lindheimeri var. halimifolia
                                                     [Laphamia halimifolia]
                                                     [Perityle halimifolia]
                                               Perityle lindheimeri var. lindheimeri
                                                     [Laphamia halimifolia subsp. lindheimeri]
                                                     [Laphamia rotundata]
                                                     [Perityle rotundata]
                                             Perityle megalocephala
                                                   [Laphamia megalocephala]
                                               Perityle megalocephala var. megalocephala
                                                     [Laphamia megalocephala]
                                               Perityle megalocephala var. oligophylla
                                             Perityle microglossa
                                                   [Perityle spilanthoides]
                                             Perityle palmeri
                                                   [Laphamia palmeri]
                                             Perityle parryi
                                             Perityle quinqueflora
                                                   [Laphamia quinqueflora]
                                             Perityle rupestris
                                                   [Laphamia rupestris]
                                               Perityle rupestris var. albiflora
                                               Perityle rupestris var. rupestris
                                                     [Laphamia rupestris]
                                             Perityle saxicola
                                                   [Laphamia saxicola]
                                             Perityle specuicola
                                             Perityle stansburii
                                                   [Laphamia stansburii]
                                                   [Perityle stansburyi]
                                             Perityle staurophylla
                                                   [Laphamia staurophylla]
                                               Perityle staurophylla var. homoflora
                                               Perityle staurophylla var. staurophylla
                                                     [Laphamia staurophylla]
                                             Perityle tenella
                                                   [Laphamia palmeri var. tenella]
                                                   [Laphamia palmeri]
                                             Perityle vaseyi
                                             Perityle villosa
                                                   [Laphamia villosa]
                                             Perityle vitreomontana
                                             Perityle warnockii
                                     Perizoma
                                     Persica
                                     Petasites
                                             Petasites frigidus
                                               Petasites frigidus subsp. frigidus
                                                     [Petasites alaskanus]
                                                     [Petasites corymbosus]
                                                     [Petasites frigidus subsp. nivalis]
                                                     [Petasites frigidus var. corymbosus]
                                                     [Petasites frigidus var. hyperboreoides]
                                                     [Petasites frigidus var. nivalis]
                                                     [Petasites gracilis]
                                                     [Petasites hyperboreus]
                                                     [Petasites nivalis]
                                               Petasites frigidus var. frigidus
                                                     [Petasites alaskanus]
                                                     [Petasites corymbosus]
                                                     [Petasites frigidus subsp. nivalis]
                                                     [Petasites frigidus var. corymbosus]
                                                     [Petasites frigidus var. hyperboreoides]
                                                     [Petasites frigidus var. nivalis]
                                                     [Petasites gracilis]
                                                     [Petasites hyperboreus]
                                                     [Petasites nivalis]
                                               Petasites frigidus var. palmatus
                                                     [Nardosmia arctica]
                                                     [Petasites arcticus]
                                                     [Petasites frigidus subsp. arcticus]
                                                     [Petasites frigidus subsp. palmatus]
                                                     [Petasites hookerianus]
                                                     [Petasites palmatus]
                                                     [Petasites speciosus]
                                               Petasites frigidus var. sagittatus
                                                     [Petasites dentatus]
                                                     [Petasites sagittatus]
                                               Petasites frigidus var. vitifolius
                                                     [Nardosmia vitifolia]
                                                     [Petasites nivalis subsp. vitifolius]
                                                     [Petasites palmatus var. frigidus]
                                                     [Petasites trigonophylla]
                                                     [Petasites vitifolius]
                                                     [Petasites warrenii]
                                             Petasites hybridus
                                                   [Petasites officinalis]
                                                   [Petasites vulgaris]
                                               Petasites hybridus subsp. hybridus
                                                     [Petasites officinalis]
                                                     [Petasites vulgaris]
                                             Petasites japonicus
                                                   [Nardosmia japonica]
                                               Petasites japonicus subsp. japonicus
                                                     [Nardosmia japonica]
                                     Petradoria
                                             Petradoria pumila
                                                   [Solidago petradoria]
                                               Petradoria pumila subsp. pumila
                                                     [Solidago petradoria]
                                               Petradoria pumila var. graminea
                                                     [Petradoria pumila subsp. graminea]
                                                     [Solidago graminea]
                                     Peucephyllum
                                             Peucephyllum schottii
                                     Phalacroseris
                                             Phalacroseris bolanderi
                                                   [Phalacroseris bolanderi var. coronata]
                                               Phalacroseris bolanderi var. bolanderi
                                     Phalangium
                                     Phoebanthus
                                             Phoebanthus grandiflora
                                                   [Helianthella grandiflora]
                                             Phoebanthus grandiflorus
                                                   [Helianthella grandiflora]
                                             Phoebanthus tenuifolia
                                                   [Helianthella tenuifolia]
                                             Phoebanthus tenuifolius
                                                   [Helianthella tenuifolia]
                                     Picradeniopsis
                                             Picradeniopsis absinthifolia
                                                   [Bahia absinthifolia var. absinthifolia]
                                                   [Bahia absinthifolia var. dealbata]
                                                   [Bahia absinthifolia]
                                             Picradeniopsis bigelovii
                                                   [Bahia bigelovii]
                                             Picradeniopsis multiflora
                                                   [Bahia neomexicana]
                                                   [Schkuhria multiflora var. multiflora]
                                                   [Schkuhria multiflora]
                                             Picradeniopsis oppositifolia
                                                   [Bahia oppositifolia]
                                             Picradeniopsis schaffneri
                                                   [Bahia schaffneri]
                                             Picradeniopsis woodhousei
                                                   [Bahia woodhousei]
                                     Picris
                                             Picris hieracioides
                                               Picris hieracioides subsp. hieracioides
                                                     [Picris hieracioides var. alpina]
                                               Picris hieracioides subsp. kamtschatica
                                                     [Picris kamtschatica]
                                             Picris japonica
                                               Picris japonica subsp. kamtschatica
                                                     [Picris kamtschatica]
                                             Picris pauciflora
                                             Picris sprengeriana
                                     Picrothamnus
                                     Pilosella
                                               Oenothera pilosella subsp. sessilis
                                                     [Oenothera sessilis]
                                             Pilosella abscissa
                                                   [Hieracium abscissum]
                                                   [Hieracium rusbyi]
                                             Pilosella albiflora
                                                   [Chlorocrepis albiflora]
                                                   [Hieracium albiflorum]
                                             Pilosella arguta
                                                   [Hieracium argutum var. parishii]
                                                   [Hieracium argutum]
                                             Pilosella aurantiaca
                                               Pilosella aurantiaca subsp. aurantiaca
                                                     [Hieracium aurantiacum]
                                             Pilosella caespitosa
                                               Pilosella caespitosa subsp. caespitosa
                                                     [Hieracium caespitosum]
                                                     [Hieracium pratense]
                                             Pilosella friesii
                                                   [Hieracium schultzii]
                                                   [Hieracium wrightii]
                                             Pilosella glomerata
                                                   [Hieracium glomeratum]
                                             Pilosella horrida
                                                   [Hieracium horridum]
                                             Pilosella hyperborea
                                                   [Hieracium piloselloides]
                                             Pilosella kalksburgensis
                                             Pilosella lactucella
                                               Pilosella lactucella subsp. lactucella
                                                     [Hieracium lactucella]
                                               Pilosella lactucella subsp. nana
                                                     [Hieracium auricula]
                                             Pilosella longipila
                                                   [Hieracium longipilum]
                                             Pilosella macrostolona
                                                   [Hieracium flagellare subsp. cernuiforme]
                                                   [Hieracium flagellare]
                                             Pilosella officinarum
                                               Pilosella officinarum subsp. officinarum
                                                     [Hieracium pilosella var. pilosella]
                                                     [Hieracium pilosella]
                                             Pilosella paniculata
                                                   [Hieracium paniculatum]
                                             Pilosella piloselloides
                                               Pilosella piloselloides subsp. piloselloides
                                                     [Hieracium florentinum]
                                               Pilosella piloselloides subsp. praealta
                                                     [Hieracium praealtum]
                                             Pilosella scouleri
                                                   [Hieracium albertinum]
                                                   [Hieracium chapacanum]
                                                   [Hieracium cusickii]
                                                   [Hieracium cynoglossoides]
                                                   [Hieracium scouleri var. albertinum]
                                                   [Hieracium scouleri var. griseum]
                                             Pilosella tardans
                                                   [Hieracium pilosella var. niveum]
                                             Pilosella tristis
                                                   [Chlorocrepis tristis]
                                                   [Hieracium gracile var. alaskanum]
                                                   [Hieracium gracile var. densifloccosum]
                                                   [Hieracium gracile var. detonsum]
                                                   [Hieracium gracile var. gracile]
                                                   [Hieracium gracile var. yukonense]
                                                   [Hieracium gracile]
                                                   [Hieracium triste subsp. gracile]
                                                   [Hieracium triste var. fulvum]
                                                   [Hieracium triste var. gracile]
                                                   [Hieracium triste var. triste]
                                                   [Hieracium triste]
                                             Pilosella venosa
                                                   [Hieracium venosum var. nudicaule]
                                                   [Hieracium venosum]
                                     Pinaropappus
                                             Pinaropappus parvus
                                             Pinaropappus roseus
                                               Pinaropappus roseus subsp. roseus
                                                     [Achyrophorus roseus]
                                                     [Pinaropappus roseus var. foliosus]
                                               Pinaropappus roseus var. roseus
                                                     [Achyrophorus roseus]
                                     Piptocarpha
                                             Piptocarpha tetrantha
                                     Piptocoma
                                             Piptocoma acevedoi
                                             Piptocoma antillana
                                             Piptocoma rufescens
                                     Pityopsis
                                             Pityopsis aspera
                                                   [Chrysopsis aspera]
                                                   [Chrysopsis graminifolia var. aspera]
                                                   [Heterotheca aspera]
                                               Pityopsis aspera var. adenolepis
                                                     [Chrysopsis adenolepis]
                                                     [Heterotheca adenolepis]
                                                     [Pityopsis adenolepis]
                                               Pityopsis aspera var. aspera
                                                     [Chrysopsis aspera]
                                                     [Chrysopsis graminifolia var. aspera]
                                                     [Heterotheca aspera]
                                             Pityopsis falcata
                                                   [Chrysopsis falcata]
                                                   [Heterotheca falcata]
                                             Pityopsis flexuosa
                                                   [Chrysopsis flexuosa]
                                                   [Heterotheca flexuosa]
                                             Pityopsis graminifolia
                                                   [Chrysopsis graminifolia]
                                                   [Chrysopsis nervosa]
                                                   [Heterotheca graminifolia]
                                                   [Heterotheca nervosa]
                                               Pityopsis graminifolia var. aequilifolia
                                               Pityopsis graminifolia var. graminifolia
                                                     [Chrysopsis graminifolia]
                                                     [Chrysopsis nervosa]
                                                     [Heterotheca correllii]
                                                     [Heterotheca graminifolia]
                                                     [Heterotheca nervosa]
                                               Pityopsis graminifolia var. latifolia
                                                     [Chrysopsis graminifolia var. latifolia]
                                                     [Heterotheca correllii]
                                               Pityopsis graminifolia var. tenuifolia
                                                     [Chrysopsis graminifolia var. microcephala]
                                                     [Chrysopsis microcephala]
                                                     [Heterotheca graminifolia var. tenuifolia]
                                                     [Heterotheca microcephala]
                                                     [Heterotheca nervosa var. microcephala]
                                                     [Pityopsis graminifolia var. microcephala]
                                                     [Pityopsis microcephala]
                                               Pityopsis graminifolia var. tracyi
                                                     [Chrysopsis tracyi]
                                                     [Heterotheca graminifolia var. tracyi]
                                                     [Pityopsis tracyi]
                                             Pityopsis oligantha
                                                   [Chrysopsis oligantha]
                                                   [Heterotheca oligantha]
                                             Pityopsis pinifolia
                                                   [Chrysopsis pinifolia]
                                                   [Heterotheca pinifolia]
                                             Pityopsis ruthii
                                                   [Chrysopsis ruthii]
                                                   [Heterotheca ruthii]
                                     Plateilema
                                             Plateilema palmeri
                                     Platyschkuhria
                                             Platyschkuhria integrifolia
                                                   [Bahia nudicaulis var. desertorum]
                                                   [Bahia nudicaulis var. oblongifolia]
                                                   [Bahia nudicaulis var. ourolepis]
                                                   [Bahia nudicaulis]
                                                   [Bahia oblongifolia]
                                                   [Bahia ourolepis]
                                                   [Platyschkuhria integrifolia var. desertorum]
                                                   [Platyschkuhria integrifolia var. oblongifolia]
                                                   [Platyschkuhria integrifolia var. ourolepis]
                                                   [Platyschkuhria oblongifolia]
                                               Platyschkuhria integrifolia var. integrifolia
                                                     [Bahia nudicaulis]
                                     Plecostachys
                                             Plecostachys serpyllifolia
                                     Plectocephalus
                                             Plectocephalus americanus
                                                   [Centaurea americana]
                                             Plectocephalus rothrockii
                                                   [Centaurea rothrockii]
                                     Pleiacanthus
                                             Pleiacanthus spinosus
                                                   [Lygodesmia spinosa]
                                                   [Stephanomeria spinosa]
                                     Pleiotaenia
                                     Pleurocoronis
                                             Pleurocoronis pluriseta
                                                   [Hofmeisteria pluriseta]
                                     Pleurogyne
                                     Pluchea
                                             Pluchea baccharis
                                                   [Pluchea rosea]
                                             Pluchea camphorata
                                                   [Pluchea petiolata]
                                                   [Pluchea purpurascens]
                                                   [Pluchea viscida]
                                             Pluchea carolinensis
                                                   [Conyza carolinensis]
                                                   [Conyza cortesii]
                                                   [Pluchea cortesii]
                                                   [Pluchea fosbergii]
                                                   [Pluchea symphytifolia]
                                             Pluchea foetida
                                                   [Pluchea foetida var. imbricata]
                                                   [Pluchea imbricata]
                                                   [Pluchea tenuifolia]
                                               Pluchea foetida var. foetida
                                                     [Pluchea tenuifolia]
                                             Pluchea indica
                                             Pluchea lanceolata
                                             Pluchea longifolia
                                             Pluchea odorata
                                                   [Conyza odorata]
                                                   [Pluchea petiolata]
                                               Pluchea odorata var. odorata
                                                     [Conyza odorata]
                                                     [Pluchea purpurascens]
                                               Pluchea odorata var. succulenta
                                                     [Pluchea purpurascens var. succulenta]
                                             Pluchea sagittalis
                                                   [Pluchea quitoc]
                                                   [Pluchea suaveolens]
                                             Pluchea sericea
                                                   [Berthelotia sericea]
                                                   [Polypappus sericeus]
                                                   [Tessaria sericea]
                                             Pluchea yucatanensis
                                     Podospermum
                                             Podospermum laciniatum
                                               Podospermum laciniatum subsp. laciniatum
                                                     [Scorzonera laciniata]
                                     Polymnia
                                             Polymnia canadensis
                                                   [Polymnia canadensis var. radiata]
                                                   [Polymnia radiata]
                                             Polymnia cossatotensis
                                             Polymnia laevigata
                                     Polyotus
                                             Polyotus peckianus
                                     Polypappus
                                     Polypteris
                                     Porophyllum
                                             Porophyllum gracile
                                                   [Porophyllum caesium]
                                                   [Porophyllum junciforme]
                                                   [Porophyllum nodosum]
                                                   [Porophyllum putidum]
                                                   [Porophyllum vaseyi]
                                             Porophyllum greggii
                                             Porophyllum leiocarpum
                                                   [Porophyllum macrocephalum var. leiocarpum]
                                             Porophyllum pygmaeum
                                             Porophyllum ruderale
                                                   [Cacalia porophyllum]
                                                   [Kleinia glandulosa]
                                                   [Kleinia ruderalis]
                                                   [Porophyllum latifolium]
                                                   [Porophyllum porophyllum]
                                               Porophyllum ruderale subsp. ruderale
                                                     [Cacalia porophyllum]
                                                     [Kleinia ruderalis]
                                                     [Porophyllum porophyllum]
                                               Porophyllum ruderale var. macrocephalum
                                                     [Porophyllum macrocephalum]
                                                     [Porophyllum ruderale subsp. macrocephalum]
                                             Porophyllum scoparium
                                     Porsildia
                                     Porteranthus
                                     Praxelis
                                             Praxelis clematidea
                                                   [Eupatorium clematideum]
                                     Prenanthella
                                     Prenanthes
                                             Prenanthes mainensis
                                     Proustia
                                     Psacalium
                                             Psacalium decompositum
                                                   [Cacalia decomposita]
                                                   [Odontotrichum decompositum]
                                     Psathyrotes
                                             Psathyrotes annua
                                                   [Bulbostylis annua]
                                             Psathyrotes pilifera
                                             Psathyrotes ramosissima
                                                   [Tetradymia ramosissima]
                                     Psathyrotopsis
                                             Psathyrotopsis scaposa
                                                   [Psathyrotes scaposa]
                                     Psedera
                                     Pseudelephantopus
                                             Pseudelephantopus spicatus
                                                   [Elephantopus spicatus]
                                             Pseudelephantopus spirilis
                                     Pseudobahia
                                             Pseudobahia bahiifolia
                                             Pseudobahia heermannii
                                                   [Pseudobahia bahiifolia var. pinnatifida]
                                             Pseudobahia peirsonii
                                     Pseudoclappia
                                             Pseudoclappia arenaria
                                             Pseudoclappia watsonii
                                     Pseudoconyza
                                             Pseudoconyza viscosa
                                                   [Conyza lyrata]
                                                   [Eschenbachia lyrata]
                                     Pseudognaphalium
                                             Pseudognaphalium arizonicum
                                                   [Gnaphalium arizonicum]
                                             Pseudognaphalium attenuatum
                                                   [Gnaphalium attenuatum]
                                             Pseudognaphalium austrotexanum
                                             Pseudognaphalium beneolens
                                                   [Gnaphalium beneolens]
                                                   [Gnaphalium canescens subsp. beneolens]
                                                   [Pseudognaphalium canescens subsp. beneolens]
                                             Pseudognaphalium biolettii
                                                   [Gnaphalium bicolor]
                                                   [Pseudognaphalium bicolor]
                                             Pseudognaphalium californicum
                                                   [Gnaphalium californicum]
                                             Pseudognaphalium canescens
                                                   [Gnaphalium canescens subsp. canescens]
                                                   [Gnaphalium canescens]
                                                   [Gnaphalium wrightii]
                                               Pseudognaphalium canescens subsp. canescens
                                                     [Gnaphalium canescens subsp. canescens]
                                                     [Gnaphalium canescens]
                                                     [Gnaphalium wrightii]
                                             Pseudognaphalium domingense
                                                   [Gnaphalium domingense]
                                                   [Gnaphalium elegans]
                                                   [Gnaphalium portoricense]
                                                   [Pseudognaphalium elegans]
                                             Pseudognaphalium helleri
                                                   [Gnaphalium helleri]
                                                   [Gnaphalium obtusifolium var. helleri]
                                               Pseudognaphalium helleri subsp. helleri
                                                     [Gnaphalium helleri]
                                                     [Gnaphalium obtusifolium var. helleri]
                                             Pseudognaphalium jaliscense
                                                   [Gnaphalium jaliscense]
                                             Pseudognaphalium leucocephalum
                                                   [Gnaphalium leucocephalum]
                                             Pseudognaphalium macounii
                                                   [Gnaphalium decurrens]
                                                   [Gnaphalium macounii]
                                             Pseudognaphalium micradenium
                                                   [Gnaphalium helleri var. micradenium]
                                                   [Gnaphalium obtusifolium var. micradenium]
                                                   [Pseudognaphalium helleri subsp. micradenium]
                                             Pseudognaphalium microcephalum
                                                   [Gnaphalium canescens subsp. microcephalum]
                                                   [Gnaphalium microcephalum]
                                                   [Pseudognaphalium canescens subsp. microcephalum]
                                             Pseudognaphalium montevidense
                                                   [Gnaphalium chilense]
                                             Pseudognaphalium obtusifolium
                                                   [Gnaphalium obtusifolium var. praecox]
                                               Pseudognaphalium obtusifolium subsp. obtusifolium
                                                     [Gnaphalium obtusifolium]
                                               Pseudognaphalium obtusifolium subsp. praecox
                                                     [Gnaphalium obtusifolium var. praecox]
                                               Pseudognaphalium obtusifolium subsp. saxicola
                                                     [Gnaphalium obtusifolium var. saxicola]
                                                     [Gnaphalium saxicola]
                                             Pseudognaphalium pringlei
                                                   [Gnaphalium pringlei]
                                             Pseudognaphalium ramosissimum
                                                   [Gnaphalium ramosissimum]
                                             Pseudognaphalium roseum
                                                   [Gnaphalium roseum]
                                             Pseudognaphalium sandwicensium
                                                   [Gnaphalium sandwicensium var. flagellare]
                                                   [Gnaphalium sandwicensium var. lineatum]
                                                   [Gnaphalium sandwicensium]
                                               Pseudognaphalium sandwicensium subsp. sandwicensium
                                               Pseudognaphalium sandwicensium var. hawaiiense
                                                     [Gnaphalium hawaiiense]
                                                     [Gnaphalium sandwicensium var. hawaiiense]
                                                     [Pseudognaphalium sandwicensium subsp. hawaiiense]
                                               Pseudognaphalium sandwicensium var. kilaueanum
                                                     [Gnaphalium sandwicensium var. kilaueanum]
                                                     [Pseudognaphalium sandwicensium subsp. kilaueanum]
                                               Pseudognaphalium sandwicensium var. molokaiense
                                                     [Gnaphalium sandwicensium var. molokaiense]
                                                     [Pseudognaphalium sandwicensium subsp. molokaiense]
                                               Pseudognaphalium sandwicensium var. sandwicensium
                                                     [Gnaphalium sandwicensium var. flagellare]
                                                     [Gnaphalium sandwicensium var. lineatum]
                                                     [Gnaphalium sandwicensium]
                                             Pseudognaphalium saxicola
                                                   [Gnaphalium obtusifolium var. saxicola]
                                                   [Gnaphalium saxicola]
                                             Pseudognaphalium stramineum
                                                   [Gnaphalium chilense var. confertifolium]
                                                   [Gnaphalium chilense]
                                                   [Gnaphalium stramineum]
                                             Pseudognaphalium thermale
                                                   [Gnaphalium canescens subsp. thermale]
                                                   [Gnaphalium microcephalum subsp. thermale]
                                                   [Gnaphalium microcephalum var. thermale]
                                                   [Gnaphalium thermale]
                                                   [Pseudognaphalium canescens subsp. thermale]
                                                   [Pseudognaphalium microcephalum var. thermale]
                                             Pseudognaphalium viscosum
                                                   [Gnaphalium viscosum]
                                     Pseudogynoxys
                                             Pseudogynoxys chenopodioides
                                                   [Senecio confusus]
                                     Pseudomorus
                                     Psilactis
                                             Psilactis asteroides
                                                   [Aster boltoniae]
                                                   [Machaeranthera boltoniae]
                                                   [Psilactis leptos]
                                             Psilactis brevilingulata
                                                   [Machaeranthera brevilingulata]
                                             Psilactis gentryi
                                                   [Machaeranthera mexicana]
                                             Psilactis heterocarpa
                                                   [Machaeranthera heterocarpa]
                                             Psilactis tenuis
                                                   [Machaeranthera tenuis]
                                     Psilocarphus
                                             Psilocarphus brevissimus
                                               Psilocarphus brevissimus var. brevissimus
                                               Psilocarphus brevissimus var. multiflorus
                                             Psilocarphus elatior
                                             Psilocarphus oregonus
                                             Psilocarphus tenellus
                                               Psilocarphus tenellus var. globiferus
                                                     [Psilocarphus chilensis]
                                                     [Psilocarphus tenellus var. tenuis]
                                               Psilocarphus tenellus var. tenellus
                                     Psilocarya
                                     Psilochenia
                                     Psilostrophe
                                             Psilostrophe bakeri
                                             Psilostrophe cooperi
                                                   [Riddellia cooperi]
                                             Psilostrophe gnaphalioides
                                             Psilostrophe sparsiflora
                                                   [Riddellia tagetina var. sparsiflora]
                                             Psilostrophe tagetina
                                                   [Psilostrophe tagetina var. grandiflora]
                                                   [Psilostrophe tagetina var. lanata]
                                                   [Riddellia tagetina]
                                               Psilostrophe tagetina var. tagetina
                                                     [Psilostrophe tagetina var. grandiflora]
                                                     [Psilostrophe tagetina var. lanata]
                                                     [Riddellia tagetina]
                                             Psilostrophe villosa
                                                   [Psilostrophe tagetina var. cerifera]
                                     Pterocaulon
                                             Pterocaulon alopecuroides
                                                   [Pterocaulon alopecuroideum]
                                             Pterocaulon alopecuroidies
                                                   [Pterocaulon alopecuroideum]
                                             Pterocaulon pycnostachyum
                                                   [Pterocaulon undulatum]
                                             Pterocaulon virgatum
                                                   [Gnaphalium virgatum]
                                     Pteronia
                                     Pulicaria
                                             Pulicaria arabica
                                                   [Vicoa auriculata]
                                             Pulicaria clausonis
                                             Pulicaria dysenterica
                                                   [Inula dysenterica]
                                               Pulicaria dysenterica subsp. dysenterica
                                                     [Inula dysenterica]
                                             Pulicaria paludosa
                                                   [Pulicaria hispanica]
                                     Pyrrhopappus
                                             Pyrrhopappus carolinianus
                                                   [Pyrrhopappus carolinianus var. georgianus]
                                                   [Pyrrhopappus georgianus]
                                                   [Sitilias caroliniana]
                                             Pyrrhopappus grandiflorus
                                                   [Pyrrhopappus scaposus]
                                                   [Sitilias grandiflora]
                                             Pyrrhopappus pauciflorus
                                                   [Pyrrhopappus geiseri]
                                                   [Pyrrhopappus multicaulis var. geiseri]
                                                   [Pyrrhopappus multicaulis]
                                                   [Sitilias multicaulis]
                                             Pyrrhopappus rothrockii
                                     Pyrrocoma
                                             Pyrrocoma apargioides
                                                   [Haplopappus apargioides]
                                             Pyrrocoma carthamoides
                                                   [Haplopappus carthamoides subsp. erythropappus]
                                                   [Haplopappus carthamoides subsp. rigidus]
                                                   [Haplopappus carthamoides var. erythropappus]
                                                   [Haplopappus carthamoides var. rigidus]
                                                   [Haplopappus carthamoides]
                                               Pyrrocoma carthamoides var. carthamoides
                                                     [Haplopappus carthamoides subsp. rigidus]
                                                     [Haplopappus carthamoides var. erythropappus]
                                                     [Haplopappus carthamoides var. rigidus]
                                                     [Haplopappus carthamoides var. typicus]
                                                     [Haplopappus carthamoides]
                                               Pyrrocoma carthamoides var. cusickii
                                                     [Haplopappus carthamoides subsp. cusickii]
                                                     [Haplopappus carthamoides var. cusickii]
                                               Pyrrocoma carthamoides var. subsquarrosa
                                                     [Haplopappus carthamoides var. subsquarrosus]
                                                     [Pyrrocoma subsquarrosa]
                                             Pyrrocoma clementis
                                                   [Haplopappus clementis]
                                               Pyrrocoma clementis var. clementis
                                                     [Haplopappus clementis]
                                               Pyrrocoma clementis var. villosa
                                                     [Pyrrocoma villosa]
                                             Pyrrocoma crocea
                                                   [Haplopappus croceus]
                                               Pyrrocoma crocea var. crocea
                                                     [Haplopappus croceus subsp. typicus]
                                                     [Haplopappus croceus]
                                               Pyrrocoma crocea var. genuflexa
                                                     [Haplopappus croceus var. genuflexus]
                                                     [Pyrrocoma genuflexa]
                                               Pyrrocoma crocea var. genuflexus
                                                     [Haplopappus croceus var. genuflexus]
                                                     [Pyrrocoma genuflexa]
                                             Pyrrocoma hirta
                                                   [Haplopappus hirtus]
                                               Pyrrocoma hirta var. hirta
                                                     [Haplopappus hirtus subsp. typicus]
                                                     [Haplopappus hirtus]
                                               Pyrrocoma hirta var. lanulosa
                                                     [Haplopappus hirtus subsp. lanulosus]
                                                     [Haplopappus hirtus var. lanulosus]
                                                     [Pyrrocoma lanulosa]
                                               Pyrrocoma hirta var. sonchifolia
                                                     [Haplopappus hirtus subsp. sonchifolius]
                                                     [Haplopappus hirtus var. sonchifolius]
                                                     [Pyrrocoma sonchifolia]
                                             Pyrrocoma insecticruris
                                                   [Haplopappus insecticruris]
                                                   [Haplopappus integrifolius subsp. insecticruris]
                                             Pyrrocoma integrifolia
                                                   [Haplopappus integrifolius subsp. typicus]
                                                   [Haplopappus integrifolius]
                                             Pyrrocoma lanceolata
                                                   [Haplopappus lanceolatus subsp. solidagineus]
                                                   [Haplopappus lanceolatus subsp. tenuicaulis]
                                                   [Haplopappus lanceolatus subsp. vaseyi]
                                                   [Haplopappus lanceolatus var. sublanatus]
                                                   [Haplopappus lanceolatus var. tenuicaulis]
                                                   [Haplopappus lanceolatus var. vaseyi]
                                                   [Haplopappus lanceolatus]
                                               Pyrrocoma lanceolata var. lanceolata
                                                     [Haplopappus lanceolatus subsp. solidagineus]
                                                     [Haplopappus lanceolatus subsp. tenuicaulis]
                                                     [Haplopappus lanceolatus subsp. vaseyi]
                                                     [Haplopappus lanceolatus var. sublanatus]
                                                     [Haplopappus lanceolatus var. tenuicaulis]
                                                     [Haplopappus lanceolatus var. typicus]
                                                     [Haplopappus lanceolatus var. vaseyi]
                                                     [Haplopappus lanceolatus]
                                               Pyrrocoma lanceolata var. subviscosa
                                                     [Haplopappus subviscosus]
                                                     [Pyrrocoma subviscosa]
                                             Pyrrocoma liatriformis
                                                   [Haplopappus integrifolius subsp. liatriformis]
                                                   [Haplopappus integrifolius subsp. scaberulus]
                                                   [Haplopappus liatriformis]
                                                   [Haplopappus racemosus subsp. liatriformis]
                                             Pyrrocoma linearis
                                                   [Haplopappus uniflorus subsp. linearis]
                                             Pyrrocoma lucida
                                                   [Haplopappus lucidus]
                                                   [Haplopappus racemosus subsp. lucidus]
                                             Pyrrocoma racemosa
                                                   [Haplopappus racemosus]
                                               Pyrrocoma racemosa var. congesta
                                                     [Haplopappus racemosus subsp. congestus]
                                                     [Pyrrocoma congesta]
                                               Pyrrocoma racemosa var. paniculata
                                                     [Haplopappus paniculatus var. virgatus]
                                                     [Haplopappus paniculatus]
                                                     [Haplopappus racemosus subsp. brachycephalus]
                                                     [Haplopappus racemosus subsp. duriuscula]
                                                     [Haplopappus racemosus subsp. glomeratus]
                                                     [Haplopappus racemosus subsp. halophilus]
                                                     [Haplopappus racemosus subsp. prionophyllus]
                                                     [Haplopappus racemosus var. glomerellus]
                                                     [Haplopappus racemosus var. paniculatus]
                                                     [Haplopappus racemosus var. prionophyllus]
                                               Pyrrocoma racemosa var. pinetorum
                                                     [Haplopappus racemosus subsp. pinetorum]
                                               Pyrrocoma racemosa var. racemosa
                                                     [Haplopappus racemosus]
                                               Pyrrocoma racemosa var. sessiliflora
                                                     [Haplopappus racemosus subsp. sessiliflorus]
                                                     [Pyrrocoma sessiliflora]
                                             Pyrrocoma radiata
                                                   [Haplopappus carthamoides var. maximus]
                                                   [Haplopappus radiatus]
                                             Pyrrocoma scaberula
                                                   [Haplopappus integrifolius subsp. scaberulus]
                                             Pyrrocoma uniflora
                                                   [Haplopappus contractus]
                                                   [Haplopappus uniflorus subsp. howellii]
                                                   [Haplopappus uniflorus var. howellii]
                                                   [Haplopappus uniflorus]
                                                   [Pyrrocoma howellii]
                                               Pyrrocoma uniflora var. gossypina
                                                     [Haplopappus uniflorus subsp. gossypinus]
                                                     [Pyrrocoma gossypina]
                                               Pyrrocoma uniflora var. uniflora
                                                     [Haplopappus contractus]
                                                     [Haplopappus uniflorus subsp. howellii]
                                                     [Haplopappus uniflorus subsp. typicus]
                                                     [Haplopappus uniflorus var. howellii]
                                                     [Haplopappus uniflorus]
                                                     [Pyrrocoma howellii]
                                     Rafinesquia
                                             Rafinesquia californica
                                             Rafinesquia neomexicana
                                     Raillardella
                                             Raillardella argentea
                                                   [Raillardella minima]
                                                   [Raillardia argentea]
                                             Raillardella pringlei
                                             Raillardella scaposa
                                     Raillardia
                                     Raillardiopsis
                                     Railliardia
                                             Railliardia molokaiensis
                                     Railliautia
                                     Raimannia
                                     Rainiera
                                             Rainiera stricta
                                                   [Luina stricta]
                                     Ratibida
                                             Ratibida columnifera
                                                   [Lepachys columnaris]
                                                   [Lepachys columnifera]
                                                   [Ratibida columnaris var. pulcherrima]
                                                   [Ratibida columnaris]
                                                   [Rudbeckia columnaris]
                                                   [Rudbeckia columnifera]
                                               Ratibida columnifera var. pulcherrima
                                                     [Ratibida columnaris var. pulcherrima]
                                             Ratibida peduncularis
                                                   [Lepachys peduncularis]
                                               Ratibida peduncularis var. peduncularis
                                                     [Lepachys peduncularis]
                                               Ratibida peduncularis var. picta
                                                     [Lepachys peduncularis var. picta]
                                                     [Ratibida picta]
                                             Ratibida pinnata
                                                   [Lepachys pinnata]
                                                   [Rudbeckia pinnata]
                                             Ratibida tagetes
                                                   [Rudbeckia globosa]
                                                   [Rudbeckia tagetes]
                                     Ratonia
                                     Rayjacksonia
                                             Rayjacksonia annua
                                                   [Haplopappus annuus]
                                                   [Haplopappus phyllocephalus subsp. annuus]
                                                   [Haplopappus phyllocephalus var. annuus]
                                                   [Machaeranthera annua]
                                                   [Machaeranthera phyllocephala var. annua]
                                                   [Sideranthus annuus]
                                             Rayjacksonia aurea
                                                   [Haplopappus aureus]
                                                   [Machaeranthera aurea]
                                                   [Sideranthus aureus]
                                             Rayjacksonia phyllocephala
                                                   [Eriocarpum megacephalum]
                                                   [Haplopappus phyllocephalus var. megacephalus]
                                                   [Haplopappus phyllocephalus]
                                                   [Machaeranthera phyllocephala var. megacephala]
                                                   [Machaeranthera phyllocephala]
                                                   [Sideranthus megacephalus]
                                     Razoumofskya
                                     Rectanthera
                                     Reichardia
                                             Reichardia picroides
                                             Reichardia tingitana
                                     Reimaria
                                     Remya
                                             Remya kauaiensis
                                                   [Remya kauaiensis var. magnifica]
                                                   [Remya kauaiensis var. magnifolia]
                                             Remya mauiensis
                                             Remya montgomeryi
                                     Rhagadiolus
                                             Rhagadiolus edulis
                                             Rhagadiolus stellatus
                                     Rhaponticum
                                             Rhaponticum repens
                                                   [Acroptilon repens]
                                                   [Centaurea picris]
                                                   [Centaurea repens]
                                     Rhodanthe
                                             Rhodanthe chlorocephala
                                               Rhodanthe chlorocephala subsp. chlorocephala
                                               Rhodanthe chlorocephala subsp. rosea
                                                     [Acroclinium roseum]
                                                     [Helipterum roseum]
                                     Rigiopappus
                                             Rigiopappus leptocladus
                                     Ripidium
                                     Rolandra
                                             Rolandra fruticosa
                                                   [Echinops fruticosus]
                                     Roldana
                                             Roldana hartwegii
                                                   [Roldana carlomasonii]
                                                   [Senecio carlomasonii]
                                                   [Senecio hartwegii]
                                                   [Senecio seemanii]
                                               Roldana hartwegii var. carlomasonii
                                                     [Roldana carlomasonii]
                                                     [Senecio carlomasonii]
                                     Rudbeckia
                                             Rudbeckia alpicola
                                                   [Rudbeckia occidentalis var. alpicola]
                                             Rudbeckia amplexicaulis
                                                   [Dracopis amplexicaulis]
                                             Rudbeckia auriculata
                                                   [Rudbeckia fulgida var. auriculata]
                                             Rudbeckia californica
                                             Rudbeckia chapmanii
                                             Rudbeckia deamii
                                                   [Rudbeckia fulgida var. deamii]
                                             Rudbeckia fulgida
                                                   [Rudbeckia acuminata]
                                                   [Rudbeckia foliosa]
                                               Rudbeckia fulgida var. fulgida
                                                     [Rudbeckia acuminata]
                                                     [Rudbeckia foliosa]
                                                     [Rudbeckia spathulata]
                                               Rudbeckia fulgida var. spathulata
                                                     [Rudbeckia spathulata]
                                             Rudbeckia glaucescens
                                                   [Rudbeckia californica var. glauca]
                                             Rudbeckia graminifolia
                                             Rudbeckia grandiflora
                                               Rudbeckia grandiflora var. alismifolia
                                                     [Rudbeckia alismifolia]
                                               Rudbeckia grandiflora var. grandiflora
                                             Rudbeckia heliopsidis
                                             Rudbeckia hirta
                                                   [Rudbeckia amplectens]
                                                   [Rudbeckia brittonii]
                                                   [Rudbeckia hirta var. brittonii]
                                                   [Rudbeckia hirta var. monticola]
                                                   [Rudbeckia monticola]
                                               Rudbeckia hirta var. angustifolia
                                                     [Rudbeckia divergens]
                                                     [Rudbeckia floridana var. angustifolia]
                                               Rudbeckia hirta var. floridana
                                                     [Rudbeckia floridana]
                                               Rudbeckia hirta var. hirta
                                                     [Rudbeckia amplectens]
                                                     [Rudbeckia brittonii]
                                                     [Rudbeckia hirta var. brittonii]
                                                     [Rudbeckia hirta var. monticola]
                                                     [Rudbeckia monticola]
                                               Rudbeckia hirta var. pulcherrima
                                                     [Rudbeckia bicolor]
                                                     [Rudbeckia hirta var. corymbifera]
                                                     [Rudbeckia hirta var. lanceolata]
                                                     [Rudbeckia hirta var. sericea]
                                                     [Rudbeckia hirta var. serotina]
                                                     [Rudbeckia longipes]
                                                     [Rudbeckia sericea]
                                                     [Rudbeckia serotina var. corymbifera]
                                                     [Rudbeckia serotina var. lanceolata]
                                                     [Rudbeckia serotina var. sericea]
                                                     [Rudbeckia serotina]
                                             Rudbeckia klamathensis
                                                   [Rudbeckia californica var. intermedia]
                                             Rudbeckia laciniata
                                                   [Rudbeckia laciniata var. digitata]
                                               Rudbeckia laciniata var. ampla
                                                     [Rudbeckia ampla]
                                                     [Rudbeckia laciniata subsp. ampla]
                                               Rudbeckia laciniata var. bipinnata
                                               Rudbeckia laciniata var. heterophylla
                                                     [Rudbeckia heterophylla]
                                               Rudbeckia laciniata var. humilis
                                               Rudbeckia laciniata var. laciniata
                                                     [Rudbeckia laciniata var. hortensis]
                                             Rudbeckia maxima
                                             Rudbeckia missouriensis
                                                   [Rudbeckia fulgida var. missouriensis]
                                             Rudbeckia mohrii
                                             Rudbeckia mollis
                                             Rudbeckia montana
                                                   [Rudbeckia occidentalis var. montana]
                                             Rudbeckia nitida
                                                   [Rudbeckia glabra]
                                             Rudbeckia occidentalis
                                               Rudbeckia occidentalis var. occidentalis
                                             Rudbeckia palustris
                                                   [Rudbeckia fulgida var. palustris]
                                             Rudbeckia scabrifolia
                                             Rudbeckia speciosa
                                                   [Rudbeckia fulgida var. speciosa]
                                             Rudbeckia subtomentosa
                                             Rudbeckia sullivantii
                                                   [Rudbeckia fulgida var. sullivantii]
                                                   [Rudbeckia speciosa var. sullivantii]
                                             Rudbeckia tenax
                                             Rudbeckia texana
                                                   [Rudbeckia nitida var. texana]
                                             Rudbeckia triloba
                                                   [Rudbeckia beadlei]
                                                   [Rudbeckia triloba var. beadlei]
                                               Rudbeckia triloba var. pinnatiloba
                                                     [Rudbeckia pinnatiloba]
                                               Rudbeckia triloba var. rupestris
                                                     [Rudbeckia beadlei]
                                                     [Rudbeckia rupestris]
                                                     [Rudbeckia triloba var. beadlei]
                                               Rudbeckia triloba var. triloba
                                             Rudbeckia truncata
                                             Rudbeckia umbrosa
                                                   [Rudbeckia fulgida var. umbrosa]
                                     Rugelia
                                             Rugelia nudicaulis
                                                   [Cacalia rugelia]
                                                   [Senecio rugelia]
                                     Sachsia
                                             Sachsia polycephala
                                                   [Sachsia bahamensis]
                                     Salmea
                                             Salmea scandens
                                                   [Bidens scandens]
                                     Santolina
                                             Santolina chamaecyparissus
                                     Sanvitalia
                                             Sanvitalia abertii
                                             Sanvitalia angustifolia
                                             Sanvitalia ocymoides
                                                   [Calyptocarpus blepharolepis]
                                             Sanvitalia procumbens
                                     Sartwellia
                                             Sartwellia flaveriae
                                                   [Sartwellia puberula]
                                     Saussurea
                                             Saussurea americana
                                             Saussurea angustifolia
                                               Saussurea angustifolia var. angustifolia
                                               Saussurea angustifolia var. viscida
                                                     [Saussurea viscida]
                                               Saussurea angustifolia var. yukonensis
                                                     [Saussurea angustifolia subsp. yukonensis]
                                                     [Saussurea viscida var. yukonensis]
                                             Saussurea nuda
                                                   [Saussurea densa]
                                                   [Saussurea nuda subsp. densa]
                                                   [Saussurea nuda var. densa]
                                             Saussurea tschuktschorum
                                             Saussurea weberi
                                     Scabrethia
                                             Scabrethia scabra
                                               Scabrethia scabra subsp. attenuata
                                                     [Wyethia scabra var. attenuata]
                                               Scabrethia scabra subsp. canescens
                                                     [Wyethia scabra var. canescens]
                                               Scabrethia scabra subsp. scabra
                                                     [Wyethia scabra var. scabra]
                                                     [Wyethia scabra]
                                     Schkuhria
                                             Schkuhria pinnata
                                                   [Schkuhria anthemoidea var. wrightii]
                                                   [Schkuhria anthemoidea]
                                               Schkuhria pinnata var. pinnata
                                               Schkuhria pinnata var. wislizenii
                                                     [Schkuhria pinnata var. guatemalensis]
                                                     [Schkuhria wislizeni var. frustrata]
                                                     [Schkuhria wislizeni var. wrightii]
                                             Schkuhria wislizeni
                                     Sclerocarpus
                                             Sclerocarpus africanus
                                             Sclerocarpus uniserialis
                                                   [Sclerocarpus uniserialis var. austrotexanus]
                                               Sclerocarpus uniserialis var. uniserialis
                                     Sclerolepis
                                             Sclerolepis uniflora
                                     Scolymus
                                             Scolymus grandiflorus
                                             Scolymus hispanicus
                                             Scolymus maculatus
                                     Scorzonera
                                             Scorzonera hispanica
                                     Scorzoneroides
                                             Scorzoneroides autumnalis
                                               Scorzoneroides autumnalis subsp. autumnalis
                                                     [Apargia autumnalis]
                                                     [Leontodon autumnalis subsp. autumnalis]
                                                     [Leontodon autumnalis subsp. pratensis]
                                                     [Leontodon autumnalis]
                                             Scorzoneroides hispidula
                                                   [Leontodon hastilis]
                                             Scorzoneroides muelleri
                                               Scorzoneroides muelleri subsp. muelleri
                                                     [Leontodon muelleri]
                                     Selloa
                                     Senecio
                                             Senecio amplectens
                                                   [Ligularia amplectens]
                                               Senecio amplectens var. amplectens
                                                     [Ligularia amplectens]
                                               Senecio amplectens var. holmii
                                                     [Ligularia amplectens var. holmii]
                                                     [Ligularia holmii]
                                                     [Senecio holmii]
                                             Senecio ampullaceus
                                             Senecio aphanactis
                                             Senecio argutus
                                             Senecio arizonicus
                                             Senecio aronicoides
                                             Senecio astephanus
                                             Senecio atratus
                                             Senecio bigelovii
                                                   [Ligularia bigelovii]
                                               Senecio bigelovii var. bigelovii
                                                     [Ligularia bigelovii]
                                               Senecio bigelovii var. hallii
                                                     [Ligularia bigelovii subsp. hallii]
                                                     [Ligularia bigelovii var. hallii]
                                             Senecio blochmaniae
                                             Senecio californicus
                                             Senecio cannabinifolius
                                             Senecio clarkianus
                                             Senecio clevelandii
                                             Senecio crassulus
                                                   [Senecio crassulus var. cusickii]
                                             Senecio elegans
                                             Senecio elmeri
                                                   [Senecio crepidineus]
                                             Senecio eremophilus
                                               Senecio eremophilus var. eremophilus
                                                     [Senecio glaucifolius]
                                               Senecio eremophilus var. kingii
                                                     [Senecio ambrosioides]
                                                     [Senecio eremophilus subsp. kingii]
                                               Senecio eremophilus var. macdougalii
                                                     [Senecio eremophilus subsp. macdougalii]
                                                     [Senecio macdougalii]
                                             Senecio ertterae
                                             Senecio flaccidus
                                                   [Senecio douglasii var. jamesii]
                                                   [Senecio douglasii var. longilobus]
                                                   [Senecio longilobus]
                                               Senecio flaccidus var. douglasii
                                                     [Senecio douglasii var. tularensis]
                                                     [Senecio douglasii]
                                               Senecio flaccidus var. flaccidus
                                                     [Senecio douglasii subsp. longilobus]
                                                     [Senecio douglasii var. jamesii]
                                                     [Senecio douglasii var. longilobus]
                                                     [Senecio filifolius]
                                                     [Senecio longilobus]
                                               Senecio flaccidus var. monoensis
                                                     [Senecio douglasii var. monoensis]
                                                     [Senecio monoensis]
                                             Senecio fremontii
                                                   [Senecio spartioides var. fremontii]
                                               Senecio fremontii var. blitoides
                                                     [Senecio blitoides]
                                                     [Senecio carthamoides]
                                                     [Senecio fremontii subsp. blitoides]
                                               Senecio fremontii var. fremontii
                                               Senecio fremontii var. inexpectatus
                                               Senecio fremontii var. occidentalis
                                                     [Senecio fremontii subsp. occidentalis]
                                             Senecio hallii
                                             Senecio hydrophiloides
                                                   [Senecio foetidus var. hydrophiloides]
                                                   [Senecio foetidus]
                                                   [Senecio pereziifolius]
                                             Senecio hydrophilus
                                                   [Senecio sandvicensis]
                                             Senecio integerrimus
                                               Senecio integerrimus var. exaltatus
                                                     [Senecio columbianus]
                                                     [Senecio exaltatus]
                                                     [Senecio hookeri]
                                                     [Senecio integerrimus var. vaseyi]
                                                     [Senecio lugens var. exaltatus]
                                                     [Senecio vaseyi]
                                               Senecio integerrimus var. integerrimus
                                               Senecio integerrimus var. major
                                               Senecio integerrimus var. ochroleucus
                                                     [Senecio lugens var. ochroleucus]
                                               Senecio integerrimus var. scribneri
                                                     [Senecio scribneri]
                                             Senecio kingii
                                             Senecio lemmonii
                                             Senecio linearifolius
                                               Senecio linearifolius var. linearifolius
                                             Senecio lugens
                                                   [Senecio integerrimus var. lugens]
                                             Senecio lyonii
                                             Senecio madagascariensis
                                             Senecio megacephalus
                                             Senecio mohavensis
                                             Senecio multidentatus
                                               Senecio multidentatus var. huachucanus
                                                     [Senecio huachucanus]
                                             Senecio neowebsteri
                                                   [Ligularia websteri]
                                             Senecio parryi
                                             Senecio pattersonensis
                                             Senecio pauciflorus
                                             Senecio pudicus
                                                   [Ligularia pudica]
                                                   [Senecio cernuus]
                                             Senecio quaylei
                                             Senecio rapifolius
                                             Senecio riddellii
                                                   [Senecio spartioides var. fremontii]
                                                   [Senecio spartioides var. parksii]
                                             Senecio sacramentanus
                                             Senecio scorzonella
                                                   [Senecio covillei var. scorzonella]
                                                   [Senecio covillei]
                                             Senecio serra
                                                   [Senecio serra var. altior]
                                               Senecio serra var. admirabilis
                                                     [Senecio admirabilis]
                                               Senecio serra var. serra
                                                     [Senecio serra var. altior]
                                                     [Senecio serra var. integriusculus]
                                             Senecio soldanella
                                                   [Ligularia soldanella]
                                             Senecio spartioides
                                                   [Senecio multicapitatus]
                                                   [Senecio spartioides var. granularis]
                                                   [Senecio spartioides var. multicapitatus]
                                                   [Senecio toiyabensis]
                                               Senecio spartioides var. spartioides
                                                     [Senecio spartioides var. granularis]
                                                     [Senecio toiyabensis]
                                             Senecio sphaerocephalus
                                             Senecio squalidus
                                               Senecio squalidus subsp. rupestris
                                                     [Senecio rupestris]
                                             Senecio sylvaticus
                                             Senecio taraxacoides
                                                   [Ligularia taraxacoides]
                                                   [Senecio amplectens var. taraxacoides]
                                             Senecio triangularis
                                                   [Senecio gibbsonsii]
                                                   [Senecio triangularis var. angustifolius]
                                             Senecio uintahensis
                                             Senecio umbellatus
                                                   [Senecio filifolius]
                                             Senecio viscosus
                                             Senecio vulgaris
                                             Senecio warnockii
                                             Senecio websteri
                                             Senecio wootonii
                                     Senecioides
                                     Senkenbergia
                                     Sericocarpus
                                             Sericocarpus asteroides
                                                   [Aster paternus]
                                                   [Conyza asteroides]
                                             Sericocarpus linifolius
                                                   [Aster solidagineus]
                                                   [Conyza linifolia]
                                             Sericocarpus oregonensis
                                                   [Aster oregonensis]
                                               Sericocarpus oregonensis var. californicus
                                                     [Aster oregonensis subsp. californicus]
                                                     [Sericocarpus californicus]
                                                     [Sericocarpus oregonensis subsp. californicus]
                                               Sericocarpus oregonensis var. oregonensis
                                                     [Aster oregonensis]
                                             Sericocarpus rigidus
                                                   [Aster curtus]
                                             Sericocarpus tortifolius
                                                   [Aster bifoliatus]
                                                   [Aster tortifolius]
                                                   [Conyza bifoliata]
                                                   [Sericocarpus acutisquamosus]
                                                   [Sericocarpus bifoliatus]
                                     Sericotheca
                                     Serinia
                                     Seriphidium
                                     Serratula
                                             Serratula tinctoria
                                     Shinnersia
                                             Shinnersia rivularis
                                                   [Trichocoronis rivularis]
                                     Shinnersoseris
                                             Shinnersoseris rostrata
                                                   [Lygodesmia rostrata]
                                     Sideranthus
                                     Sidneya
                                             Sidneya tenuifolia
                                                   [Heliomeris tenuifolia]
                                                   [Viguiera stenoloba var. chihuahuensis]
                                                   [Viguiera stenoloba var. stenoloba]
                                                   [Viguiera stenoloba]
                                     Sigesbeckia
                                             Sigesbeckia orientalis
                                     Silphium
                                             Silphium albiflorum
                                             Silphium asteriscus
                                               Silphium asteriscus subsp. asteriscus
                                                     [Silphium asteriscus var. scabrum]
                                                     [Silphium dentatum var. gatesii]
                                                     [Silphium gatesii]
                                                     [Silphium integrifolium var. gattingeri]
                                                     [Silphium scaberrimum]
                                               Silphium asteriscus var. asteriscus
                                                     [Silphium asteriscus var. scabrum]
                                               Silphium asteriscus var. dentatum
                                                     [Silphium asteriscus var. angustatum]
                                                     [Silphium asteriscus var. laevicaule]
                                                     [Silphium dentatum var. angustatum]
                                                     [Silphium dentatum]
                                                     [Silphium elliottii]
                                                     [Silphium incisum]
                                                     [Silphium nodum]
                                               Silphium asteriscus var. latifolium
                                                     [Silphium confertifolium]
                                                     [Silphium glabrum]
                                                     [Silphium trifoliatum var. latifolium]
                                               Silphium asteriscus var. simpsonii
                                                     [Silphium simpsonii]
                                               Silphium asteriscus var. trifoliatum
                                                     [Silphium atropurpureum]
                                                     [Silphium trifoliatum var. trifoliatum]
                                                     [Silphium trifoliatum]
                                             Silphium brachiatum
                                             Silphium compositum
                                                   [Silphium compositum subsp. ovatifolium]
                                                   [Silphium compositum subsp. reniforme]
                                                   [Silphium compositum subsp. venosum]
                                                   [Silphium compositum var. reniforme]
                                                   [Silphium compositum var. venosum]
                                                   [Silphium lapsuum]
                                                   [Silphium orae]
                                                   [Silphium ovatifolium]
                                                   [Silphium reniforme]
                                                   [Silphium venosum]
                                               Silphium compositum var. compositum
                                                     [Silphium orae]
                                               Silphium compositum var. ovatifolium
                                                     [Silphium compositum subsp. ovatifolium]
                                                     [Silphium ovatifolium]
                                             Silphium glutinosum
                                             Silphium integrifolium
                                                   [Silphium integrifolium var. deamii]
                                                   [Silphium integrifolium var. neglectum]
                                                   [Silphium laevigatum]
                                               Silphium integrifolium var. asperrimum
                                                     [Silphium asperrimum]
                                               Silphium integrifolium var. integrifolium
                                                     [Silphium laevigatum]
                                               Silphium integrifolium var. laeve
                                                     [Silphium speciosum]
                                               Silphium integrifolium var. wrightii
                                                     [Silphium simpsonii var. wrightii]
                                             Silphium laciniatum
                                                   [Silphium laciniatum var. robinsonii]
                                               Silphium laciniatum var. laciniatum
                                             Silphium mohrii
                                             Silphium perfoliatum
                                                   [Silphium scabrum]
                                               Silphium perfoliatum var. connatum
                                                     [Silphium connatum]
                                                     [Silphium perfoliatum subsp. connatum]
                                                     [Silphium scabrum]
                                               Silphium perfoliatum var. perfoliatum
                                             Silphium perplexum
                                             Silphium radula
                                                   [Silphium asperrimum]
                                                   [Silphium dentatum var. gatesii]
                                                   [Silphium gatesii]
                                                   [Silphium reverchonii]
                                               Silphium radula var. gracile
                                                     [Silphium gracile]
                                             Silphium terebinthinaceum
                                                   [Silphium rumicifolium]
                                               Silphium terebinthinaceum var. luciae-brauniae
                                               Silphium terebinthinaceum var. pinnatifidum
                                                     [Silphium pinnatifidum]
                                               Silphium terebinthinaceum var. terebinthinaceum
                                                     [Silphium rumicifolium]
                                             Silphium wasiotense
                                     Silybum
                                             Silybum marianum
                                                   [Carduus marianus]
                                                   [Mariana mariana]
                                     Simsia
                                             Simsia calva
                                             Simsia lagascaeformis
                                                   [Simsia exaristata var. perplexa]
                                                   [Simsia exaristata]
                                             Simsia lagasceiformis
                                                   [Simsia exaristata var. perplexa]
                                                   [Simsia exaristata]
                                     Smallanthus
                                             Smallanthus uvedalia
                                                   [Osteospermum uvedalia]
                                                   [Polymnia uvedalia var. densipilis]
                                                   [Polymnia uvedalia var. floridana]
                                                   [Polymnia uvedalia]
                                             Smallanthus uvedalius
                                                   [Osteospermum uvedalia]
                                                   [Polymnia uvedalia var. densipilis]
                                                   [Polymnia uvedalia var. floridana]
                                                   [Polymnia uvedalia]
                                     Solidago
                                             Solidago albopilosa
                                             Solidago altiplanities
                                             Solidago altissima
                                                   [Solidago altissima var. pluricephala]
                                                   [Solidago altissima var. procera]
                                                   [Solidago canadensis var. scabra]
                                                   [Solidago hirsutissima]
                                                   [Solidago lunellii]
                                               Solidago altissima subsp. altissima
                                                     [Solidago altissima var. canescens]
                                                     [Solidago altissima var. pluricephala]
                                                     [Solidago altissima var. procera]
                                                     [Solidago canadensis var. canescens]
                                                     [Solidago canadensis var. scabra]
                                                     [Solidago hirsutissima]
                                                     [Solidago lunellii]
                                               Solidago altissima subsp. gilvocanescens
                                                     [Solidago altissima var. gilvocanescens]
                                                     [Solidago canadensis var. gilvocanescens]
                                                     [Solidago gilvocanescens]
                                                     [Solidago pruinosa]
                                               Solidago altissima var. altissima
                                             Solidago arenicola
                                             Solidago arguta
                                                   [Solidago arguta var. neurolepis]
                                                   [Solidago dispersa]
                                                   [Solidago neurolepis]
                                               Solidago arguta var. arguta
                                               Solidago arguta var. boottii
                                                     [Solidago arguta subsp. boottii]
                                                     [Solidago boottii]
                                                     [Solidago dispersa]
                                               Solidago arguta var. caroliniana
                                                     [Solidago arguta subsp. caroliniana]
                                                     [Solidago arguta subsp. pseudoyadkinensis]
                                                     [Solidago boottii var. caroliniana]
                                                     [Solidago yadkinensis]
                                               Solidago arguta var. harrisii
                                                     [Solidago harrisii]
                                             Solidago asperula
                                             Solidago auriculata
                                                   [Solidago amplexicaulis]
                                                   [Solidago notabilis]
                                             Solidago beaudryi
                                             Solidago bicolor
                                                   [Solidago curtisii var. pubens]
                                                   [Solidago pubens]
                                               Solidago bicolor var. lanata
                                             Solidago brachyphylla
                                                   [Solidago boottii var. brachyphylla]
                                             Solidago buckleyi
                                             Solidago caesia
                                                   [Solidago axillaris]
                                                   [Solidago caesia var. axillaris]
                                                   [Solidago caesia var. paniculata]
                                                   [Solidago gracilis]
                                               Solidago caesia var. caesia
                                             Solidago calcicola
                                             Solidago canadensis
                                                   [Solidago arizonica]
                                                   [Solidago howellii]
                                               Solidago canadensis var. canadensis
                                               Solidago canadensis var. hargeri
                                             Solidago confinis
                                                   [Solidago spectabilis var. confinis]
                                             Solidago curtisii
                                                   [Solidago caesia var. curtisii]
                                                   [Solidago caesia var. hispida]
                                                   [Solidago curtisii var. pubens]
                                                   [Solidago monticola]
                                                   [Solidago pubens]
                                               Solidago curtisii var. flaccidifolia
                                                     [Solidago flaccidifolia]
                                             Solidago delicatula
                                                   [Solidago ulmifolia var. microphylla]
                                             Solidago drummondii
                                             Solidago erecta
                                                   [Solidago porteri]
                                                   [Solidago speciosa var. erecta]
                                             Solidago erskinei
                                             Solidago fallax
                                                   [Solidago lepida subsp. fallax]
                                                   [Solidago lepida var. fallax]
                                               Solidago fallax var. molina
                                                     [Solidago lepida var. molina]
                                             Solidago farwellii
                                             Solidago faucibus
                                             Solidago fistulosa
                                             Solidago flexicaulis
                                                   [Solidago latifolia]
                                             Solidago gattingeri
                                                   [Aster gattingeri]
                                             Solidago gigantea
                                                   [Aster latissimifolius var. serotinus]
                                                   [Solidago dumetorum]
                                                   [Solidago gigantea subsp. serotina]
                                                   [Solidago gigantea var. leiophylla]
                                                   [Solidago gigantea var. pitcheri]
                                                   [Solidago gigantea var. serotina]
                                                   [Solidago gigantea var. shinnersii]
                                                   [Solidago leiophallax]
                                                   [Solidago pitcheri]
                                                   [Solidago serotina]
                                                   [Solidago serotinoides]
                                             Solidago glomerata
                                                   [Aster glomeratus]
                                             Solidago guiradonis
                                             Solidago hispida
                                                   [Solidago bicolor var. concolor]
                                                   [Solidago bicolor var. ovalis]
                                                   [Solidago bicolor var. tonsa]
                                                   [Solidago hispida var. arnoglossa]
                                                   [Solidago hispida var. lanata]
                                                   [Solidago hispida var. tonsa]
                                               Solidago hispida var. hispida
                                                     [Solidago bicolor var. concolor]
                                                     [Solidago bicolor var. ovalis]
                                             Solidago houghtonii
                                                   [Oligoneuron houghtonii]
                                             Solidago jejunifolia
                                                   [Solidago speciosa var. jejunifolia]
                                                   [Solidago uliginosa var. jejunifolia]
                                             Solidago juliae
                                                   [Solidago altissima var. canescens]
                                                   [Solidago canadensis var. canescens]
                                             Solidago juncea
                                                   [Solidago juncea var. neobohemica]
                                                   [Solidago juncea var. ramosa]
                                             Solidago lancifolia
                                             Solidago latissimifolia
                                                   [Aster latissimifolius]
                                                   [Solidago edisoniana]
                                                   [Solidago elliottii var. ascendens]
                                                   [Solidago elliottii var. edisoniana]
                                                   [Solidago elliottii var. pedicellata]
                                                   [Solidago elliottii]
                                                   [Solidago elliptica]
                                                   [Solidago mirabilis]
                                             Solidago leavenworthii
                                                   [Solidago nashii]
                                             Solidago leiocarpa
                                                   [Solidago cutleri]
                                             Solidago lepida
                                                   [Solidago canadensis var. lepida]
                                                   [Solidago canadensis var. subserrata]
                                               Solidago lepida var. salebrosa
                                                     [Solidago canadensis subsp. elongata]
                                                     [Solidago canadensis subsp. salebrosa]
                                                     [Solidago canadensis var. salebrosa]
                                                     [Solidago elongata]
                                                     [Solidago lepida var. elongata]
                                             Solidago ludoviciana
                                                   [Solidago arguta var. strigosa]
                                                   [Solidago boottii var. ludoviciana]
                                                   [Solidago strigosa]
                                             Solidago lutescens
                                                   [Aster lutescens]
                                                   [Aster ptarmicoides var. lutescens]
                                                   [Diplopappus lutescens]
                                                   [Unamia lutescens]
                                             Solidago macrophylla
                                                   [Solidago macrophylla var. thyrsoidea]
                                                   [Solidago mensalis]
                                             Solidago mexicana
                                                   [Solidago angustifolia]
                                                   [Solidago petiolata]
                                                   [Solidago sempervirens subsp. mexicana]
                                                   [Solidago sempervirens var. mexicana]
                                             Solidago missouriensis
                                                   [Aster missouriensis]
                                                   [Solidago glaberrima var. moritura]
                                                   [Solidago glaberrima]
                                                   [Solidago missouriensis var. extraria]
                                                   [Solidago missouriensis var. fasciculata]
                                                   [Solidago missouriensis var. glaberrima]
                                                   [Solidago missouriensis var. montana]
                                                   [Solidago missouriensis var. tenuissima]
                                                   [Solidago missouriensis var. tolmieana]
                                                   [Solidago tenuissima]
                                               Solidago missouriensis var. missouriensis
                                                     [Solidago missouriensis var. extraria]
                                                     [Solidago missouriensis var. montana]
                                             Solidago mollis
                                                   [Solidago mollis var. angustata]
                                               Solidago mollis var. mollis
                                             Solidago multiradiata
                                               Solidago multiradiata subsp. multiradiata
                                                     [Solidago ciliosa]
                                                     [Solidago multiradiata subsp. arctica]
                                                     [Solidago multiradiata var. arctica]
                                                     [Solidago multiradiata var. scopulorum]
                                                     [Solidago scopulorum]
                                               Solidago multiradiata var. multiradiata
                                                     [Solidago anticostensis]
                                             Solidago nana
                                             Solidago nemoralis
                                               Solidago nemoralis subsp. decemflora
                                                     [Solidago decemflora]
                                                     [Solidago longipetiolata]
                                                     [Solidago nemoralis subsp. longipetiolata]
                                                     [Solidago nemoralis var. decemflora]
                                                     [Solidago nemoralis var. longipetiolata]
                                                     [Solidago pulcherrima]
                                               Solidago nemoralis subsp. nemoralis
                                                     [Solidago nemoralis subsp. haleana]
                                                     [Solidago nemoralis var. haleana]
                                               Solidago nemoralis var. nemoralis
                                                     [Solidago nemoralis subsp. haleana]
                                                     [Solidago nemoralis var. haleana]
                                             Solidago nitida
                                                   [Oligoneuron nitidum]
                                             Solidago odora
                                               Solidago odora subsp. chapmanii
                                                     [Solidago chapmanii]
                                                     [Solidago odora var. chapmanii]
                                               Solidago odora var. odora
                                                     [Solidago suaveolens]
                                             Solidago ohioensis
                                                   [Oligoneuron ohioense]
                                             Solidago ontarioensis
                                                   [Solidago glutinosa var. ontarioensis]
                                             Solidago ouachitensis
                                             Solidago ovata
                                             Solidago pallida
                                                   [Solidago speciosa var. pallida]
                                             Solidago patula
                                               Solidago patula subsp. strictula
                                                     [Solidago patula var. strictula]
                                                     [Solidago salicina]
                                               Solidago patula var. patula
                                             Solidago petiolaris
                                                   [Solidago angusta]
                                                   [Solidago lindheimeriana]
                                                   [Solidago milleriana]
                                                   [Solidago petiolaris var. angusta]
                                                   [Solidago petiolaris var. wardii]
                                                   [Solidago wardii]
                                               Solidago petiolaris var. petiolaris
                                                     [Solidago milleriana]
                                             Solidago pinetorum
                                             Solidago plumosa
                                             Solidago ptarmicoides
                                                   [Aster ptarmicoides]
                                                   [Doellingeria ptarmicoides]
                                                   [Inula alba]
                                                   [Oligoneuron album]
                                                   [Solidago asteroides]
                                                   [Unamia alba]
                                             Solidago puberula
                                               Solidago puberula subsp. pulverulenta
                                                     [Solidago pulverulenta]
                                               Solidago puberula var. puberula
                                               Solidago puberula var. pulverulenta
                                                     [Solidago pulverulenta]
                                             Solidago pulchra
                                             Solidago racemosa
                                             Solidago radula
                                                   [Solidago pendula]
                                                   [Solidago radula var. laeta]
                                                   [Solidago radula var. stenolepis]
                                                   [Solidago rotundifolia]
                                                   [Solidago scaberrima]
                                               Solidago radula var. radula
                                                     [Solidago pendula]
                                                     [Solidago rotundifolia]
                                                     [Solidago scaberrima]
                                             Solidago riddellii
                                                   [Oligoneuron riddellii]
                                                   [Solidago amplexicaulis]
                                             Solidago rigida
                                               Solidago rigida subsp. glabrata
                                                     [Oligoneuron jacksonii]
                                                     [Solidago jacksonii]
                                                     [Solidago rigida var. glabrata]
                                                     [Solidago rigida var. laevicaulis]
                                               Solidago rigida subsp. humilis
                                                     [Oligoneuron canescens]
                                                     [Oligoneuron rigidum var. humile]
                                                     [Solidago canescens]
                                                     [Solidago parvirigida]
                                                     [Solidago rigida var. humilis]
                                               Solidago rigida subsp. rigida
                                                     [Oligoneuron rigidum var. rigidum]
                                                     [Oligoneuron rigidum]
                                                     [Solidago grandiflora]
                                             Solidago rigidiuscula
                                                   [Solidago speciosa var. angustata]
                                                   [Solidago speciosa var. rigidiuscula]
                                             Solidago roanensis
                                                   [Solidago maxonii]
                                                   [Solidago roanensis var. monticola]
                                             Solidago rugosa
                                                   [Solidago rugosa var. villosa]
                                                   [Solidago scabra]
                                               Solidago rugosa subsp. rugosa
                                               Solidago rugosa var. aspera
                                                     [Solidago aspera]
                                                     [Solidago rugosa subsp. aspera]
                                               Solidago rugosa var. celtidifolia
                                                     [Solidago celtidifolia]
                                               Solidago rugosa var. rugosa
                                                     [Solidago scabra]
                                               Solidago rugosa var. sphagnophila
                                                     [Solidago aestivalis]
                                             Solidago rupestris
                                                   [Solidago canadensis var. rupestris]
                                             Solidago sciaphila
                                             Solidago sempervirens
                                               Solidago sempervirens var. sempervirens
                                             Solidago shortii
                                             Solidago simplex
                                                   [Solidago decumbens var. oreophila]
                                                   [Solidago decumbens]
                                                   [Solidago glutinosa]
                                                   [Solidago neomexicana]
                                                   [Solidago oreophila]
                                                   [Solidago spathulata subsp. glutinosa]
                                                   [Solidago spathulata var. neomexicana]
                                               Solidago simplex subsp. simplex
                                               Solidago simplex var. gillmanii
                                                     [Solidago deamii]
                                                     [Solidago gillmanii]
                                                     [Solidago glutinosa var. gillmanii]
                                                     [Solidago racemosa var. gillmanii]
                                                     [Solidago spathulata var. gillmanii]
                                               Solidago simplex var. monticola
                                                     [Solidago randii var. monticola]
                                               Solidago simplex var. nana
                                                     [Solidago bellidifolia]
                                                     [Solidago decumbens var. oreophila]
                                                     [Solidago decumbens]
                                                     [Solidago glutinosa var. nana]
                                                     [Solidago oreophila]
                                                     [Solidago spathulata var. nana]
                                               Solidago simplex var. ontarioensis
                                                     [Solidago glutinosa var. ontarioensis]
                                               Solidago simplex var. racemosa
                                                     [Solidago anticostensis]
                                                     [Solidago glutinosa var. racemosa]
                                                     [Solidago spathulata var. racemosa]
                                               Solidago simplex var. randii
                                                     [Solidago glutinosa subsp. randii]
                                                     [Solidago glutinosa var. randii]
                                                     [Solidago randii]
                                                     [Solidago simplex subsp. randii]
                                                     [Solidago spathulata subsp. randii]
                                               Solidago simplex var. simplex
                                                     [Solidago glutinosa]
                                                     [Solidago neomexicana]
                                                     [Solidago spathulata subsp. glutinosa]
                                                     [Solidago spathulata var. neomexicana]
                                             Solidago spathulata
                                                   [Solidago simplex var. spathulata]
                                               Solidago spathulata subsp. spathulata
                                             Solidago speciosa
                                                   [Solidago conferta]
                                                   [Solidago harperi]
                                               Solidago speciosa var. speciosa
                                                     [Solidago conferta]
                                                     [Solidago harperi]
                                             Solidago spectabilis
                                               Solidago spectabilis var. spectabilis
                                             Solidago sphacelata
                                                   [Brachychaeta sphacelata]
                                             Solidago spithamaea
                                             Solidago squarrosa
                                             Solidago stricta
                                                   [Solidago chrysopsis]
                                               Solidago stricta subsp. gracillima
                                                     [Solidago austrina]
                                                     [Solidago gracillima]
                                                     [Solidago perlonga]
                                               Solidago stricta subsp. stricta
                                                     [Solidago chrysopsis]
                                                     [Solidago flavovirens]
                                             Solidago tarda
                                             Solidago tortifolia
                                             Solidago uliginosa
                                                   [Solidago chrysolepis]
                                                   [Solidago neglecta]
                                                   [Solidago purshii]
                                                   [Solidago simulans]
                                                   [Solidago uliginosa var. levipes]
                                                   [Solidago uliginosa var. linoides]
                                                   [Solidago uliginosa var. peracuta]
                                                   [Solidago uniligulata var. levipes]
                                                   [Solidago uniligulata]
                                               Solidago uliginosa var. terrae-novae
                                               Solidago uliginosa var. uliginosa
                                                     [Solidago neglecta]
                                                     [Solidago uliginosa var. neglecta]
                                                     [Solidago uniligulata]
                                             Solidago ulmicaesia
                                             Solidago ulmifolia
                                                   [Solidago helleri]
                                               Solidago ulmifolia var. palmeri
                                               Solidago ulmifolia var. ulmifolia
                                             Solidago velutina
                                                   [Solidago arizonica]
                                                   [Solidago californica var. nevadensis]
                                                   [Solidago canadensis var. arizonica]
                                                   [Solidago howellii]
                                                   [Solidago sparsiflora]
                                                   [Solidago spathulata var. subcinerea]
                                                   [Solidago trinervata]
                                               Solidago velutina subsp. californica
                                                     [Solidago californica]
                                               Solidago velutina subsp. sparsiflora
                                                     [Solidago californica var. nevadensis]
                                                     [Solidago canadensis var. arizonica]
                                                     [Solidago sparsiflora]
                                                     [Solidago spathulata var. subcinerea]
                                                     [Solidago trinervata]
                                               Solidago velutina var. nevadensis
                                             Solidago verna
                                             Solidago villosicarpa
                                             Solidago virgauera
                                             Solidago virgaurea
                                               Solidago virgaurea subsp. virgaurea
                                                     [Solidago axillaris]
                                                     [Solidago corymbosa]
                                                     [Solidago monticola]
                                             Solidago wrightii
                                                   [Solidago bigelovii var. wrightii]
                                                   [Solidago bigelovii]
                                                   [Solidago wrightii f. adenophora]
                                                   [Solidago wrightii var. adenophora]
                                               Solidago wrightii var. wrightii
                                                     [Solidago bigelovii var. wrightii]
                                     Soliva
                                             Soliva anthemifolia
                                                   [Gymnostyles anthemifolia]
                                                   [Soliva mutisii]
                                             Soliva sessilis
                                                   [Soliva daucifolia]
                                                   [Soliva pterosperma]
                                             Soliva stolonifera
                                                   [Gymnostyles nasturtiifolia]
                                                   [Gymnostyles stolonifera]
                                                   [Soliva nasturtiifolia]
                                     Sonchus
                                             Sonchus arvensis
                                                   [Sonchus arvensis/oleraceus]
                                               Sonchus arvensis subsp. arvensis
                                                     [Sonchus arvensis var. shumovichii]
                                               Sonchus arvensis subsp. uliginosus
                                                     [Sonchus arvensis f. glabrescens]
                                                     [Sonchus arvensis var. glabrescens]
                                                     [Sonchus uliginosus]
                                             Sonchus asper
                                                   [Sonchus asper subsp. glaucescens]
                                                   [Sonchus nymanii]
                                               Sonchus asper subsp. asper
                                             Sonchus glaucescens
                                                   [Sonchus asper subsp. glaucescens]
                                                   [Sonchus nymanii]
                                             Sonchus oleraceus
                                                   [Sonchus arvensis/oleraceus]
                                             Sonchus tenerrimus
                                     Sphaerocephalus
                                             Sphaerocephalus palustris
                                     Sphaeromeria
                                             Sphaeromeria capitata
                                                   [Tanacetum capitatum]
                                     Sphaerostigma
                                     Sphagneticola
                                             Sphagneticola brachycarpa
                                             Sphagneticola calendulacea
                                             Sphagneticola gracilis
                                                   [Complaya gracilis]
                                                   [Thelechitonia gracilis]
                                                   [Wedelia gracilis]
                                             Sphagneticola trilobata
                                                   [Complaya trilobata]
                                                   [Silphium trilobatum]
                                                   [Thelechitonia trilobata]
                                                   [Wedelia trilobata]
                                     Spilanthes
                                     Spiracantha
                                             Spiracantha cornifolia
                                     Stenotus
                                             Stenotus acaulis
                                                   [Haplopappus acaulis subsp. glabratus]
                                                   [Haplopappus acaulis subsp. typicus]
                                                   [Haplopappus acaulis var. glabratus]
                                                   [Stenotus acaulis var. glabratus]
                                               Stenotus acaulis var. acaulis
                                             Stenotus armerioides
                                               Stenotus armerioides var. armerioides
                                                     [Haplopappus armerioides]
                                               Stenotus armerioides var. gramineus
                                                     [Haplopappus armerioides var. gramineus]
                                             Stenotus lanuginosus
                                                   [Haplopappus lanuginosus subsp. andersonii]
                                                   [Haplopappus lanuginosus subsp. typicus]
                                                   [Haplopappus lanuginosus var. andersonii]
                                                   [Haplopappus lanuginosus]
                                                   [Stenotus andersonii]
                                               Stenotus lanuginosus var. andersonii
                                                     [Haplopappus lanuginosus subsp. andersonii]
                                                     [Haplopappus lanuginosus var. andersonii]
                                                     [Stenotus andersonii]
                                               Stenotus lanuginosus var. lanuginosus
                                     Stephanomeria
                                             Stephanomeria cichoriacea
                                             Stephanomeria diegensis
                                             Stephanomeria elata
                                             Stephanomeria exigua
                                               Stephanomeria exigua subsp. carotifera
                                                     [Stephanomeria carotifera]
                                               Stephanomeria exigua subsp. coronaria
                                                     [Stephanomeria coronaria]
                                                     [Stephanomeria exigua var. coronaria]
                                               Stephanomeria exigua subsp. deanei
                                                     [Stephanomeria exigua var. deanei]
                                               Stephanomeria exigua subsp. exigua
                                                     [Lygodesmia bigelovii]
                                                     [Stephanomeria exigua subsp. pentachaeta]
                                                     [Stephanomeria exigua var. pentachaeta]
                                                     [Stephanomeria schottii]
                                               Stephanomeria exigua subsp. macrocarpa
                                             Stephanomeria fluminea
                                             Stephanomeria lactucina
                                             Stephanomeria malheurensis
                                             Stephanomeria paniculata
                                             Stephanomeria parryi
                                             Stephanomeria pauciflora
                                                   [Lygodesmia juncea/Stephanomeria pauciflora]
                                                   [Lygodesmia pauciflora]
                                                   [Ptiloria pauciflora]
                                                   [Stephanomeria cinerea]
                                                   [Stephanomeria lygodesmoides]
                                                   [Stephanomeria neomexicana]
                                                   [Stephanomeria pauciflora var. parishii]
                                               Stephanomeria pauciflora var. pauciflora
                                             Stephanomeria runcinata
                                                   [Ptiloria ramosa]
                                             Stephanomeria tenuifolia
                                                   [Lygodesmia tenuifolia]
                                                   [Lygodesmia wrightii]
                                                   [Stephanomeria minor var. minor]
                                                   [Stephanomeria minor]
                                                   [Stephanomeria myrioclada]
                                                   [Stephanomeria neomexicana]
                                                   [Stephanomeria tenuifolia var. myrioclada]
                                                   [Stephanomeria tenuifolia var. uintaensis]
                                                   [Stephanomeria wrightii]
                                             Stephanomeria thurberi
                                                   [Lygodesmia thurberi]
                                             Stephanomeria virgata
                                               Stephanomeria virgata subsp. pleurocarpa
                                               Stephanomeria virgata subsp. virgata
                                                     [Stephanomeria virgata var. tomentosa]
                                     Stevia
                                             Stevia lemmonii
                                               Stevia lemmonii var. lemmonii
                                             Stevia micrantha
                                             Stevia ovata
                                                   [Stevia rhombifolia]
                                               Stevia ovata var. texana
                                                     [Stevia rhombifolia]
                                             Stevia plummerae
                                                   [Stevia plummerae var. alba]
                                               Stevia plummerae var. plummerae
                                             Stevia salicifolia
                                                   [Stevia salicifolia var. stenophylla]
                                                   [Stevia stenophylla]
                                             Stevia serrata
                                                   [Stevia serrata var. haplopappa]
                                                   [Stevia serrata var. ivifolia]
                                             Stevia viscida
                                     Stokesia
                                             Stokesia laevis
                                                   [Carthamus laevis]
                                     Struchium
                                             Struchium sparganophorum
                                                   [Ethulia sparganophora]
                                     Stylocline
                                             Stylocline amphibola
                                                   [Micropus amphibolus]
                                             Stylocline citroleum
                                             Stylocline gnaphalioides
                                             Stylocline intertexta
                                             Stylocline masonii
                                             Stylocline micropoides
                                             Stylocline psilocarphoides
                                             Stylocline sonorensis
                                     Symphyotrichum
                                             Symphyotrichum adnatum
                                                   [Aster adnatus]
                                                   [Lasallea adnata]
                                                   [Virgulus adnatus]
                                             Symphyotrichum amethystinum
                                                   [Aster amethystinus]
                                                   [Lasallea amethystina]
                                                   [Virgulus amethystinus]
                                             Symphyotrichum anomalum
                                                   [Aster anomalus]
                                             Symphyotrichum anticostense
                                                   [Aster anticostensis]
                                                   [Aster gaspensis]
                                             Symphyotrichum ascendens
                                                   [Aster adscendens]
                                                   [Aster chilensis subsp. adscendens]
                                                   [Aster macounii]
                                                   [Aster ramulosus]
                                                   [Aster subgriseus]
                                                   [Virgulaster ascendens]
                                             Symphyotrichum batesii
                                                   [Aster batesii]
                                             Symphyotrichum boreale
                                                   [Aster borealis]
                                                   [Aster franklinianus]
                                                   [Aster junceus]
                                                   [Aster junciformis]
                                                   [Aster laxifolius var. borealis]
                                             Symphyotrichum campestre
                                                   [Aster campestris var. bloomeri]
                                                   [Aster campestris]
                                                   [Symphyotrichum campestre var. bloomeri]
                                                   [Virgulus campestris]
                                               Symphyotrichum campestre var. campestre
                                                     [Aster campestris]
                                                     [Virgulus campestris]
                                             Symphyotrichum chapmanii
                                                   [Aster chapmanii]
                                                   [Eurybia chapmanii]
                                             Symphyotrichum chilense
                                                   [Aster chilensis var. invenustus]
                                                   [Aster chilensis var. medius]
                                                   [Aster chilensis]
                                                   [Aster invenustus]
                                                   [Aster radula]
                                                   [Aster sonomensis]
                                                   [Symphyotrichum chilense var. invenustum]
                                                   [Symphyotrichum chilense var. medium]
                                               Symphyotrichum chilense var. chilense
                                                     [Aster chilensis]
                                             Symphyotrichum ciliatum
                                                   [Aster brachyactis]
                                                   [Brachyactis angusta]
                                                   [Brachyactis ciliata subsp. angusta]
                                                   [Brachyactis ciliata]
                                                   [Tripolium angustum]
                                             Symphyotrichum ciliolatum
                                                   [Aster ciliolatus var. comatus]
                                                   [Aster ciliolatus var. maccallae]
                                                   [Aster ciliolatus var. wilsonii]
                                                   [Aster ciliolatus]
                                                   [Aster foliaceus var. subgeminatus]
                                                   [Aster lindleyanus]
                                                   [Aster maccallae]
                                                   [Aster paniculatus]
                                                   [Aster saundersii]
                                                   [Aster subgeminatus]
                                                   [Aster wilsonii]
                                                   [Symphyotrichum ciliolatum var. comatum]
                                                   [Symphyotrichum ciliolatum var. maccallae]
                                                   [Symphyotrichum ciliolatum var. wilsonii]
                                             Symphyotrichum columbianum
                                                   [Aster columbianus]
                                             Symphyotrichum concolor
                                                   [Aster concolor var. simulatus]
                                                   [Aster concolor]
                                                   [Aster plumosus]
                                                   [Aster simulatus]
                                                   [Lasallea concolor]
                                                   [Virgulus concolor]
                                             Symphyotrichum cordifolium
                                                   [Aster cordifolius subsp. sagittifolius]
                                                   [Aster cordifolius var. furbishiae]
                                                   [Aster cordifolius var. incisus]
                                                   [Aster cordifolius var. laevigatus]
                                                   [Aster cordifolius var. lanceolatus]
                                                   [Aster cordifolius var. moratus]
                                                   [Aster cordifolius var. polycephalus]
                                                   [Aster cordifolius var. racemiflorus]
                                                   [Aster cordifolius var. sagittifolius]
                                                   [Aster cordifolius]
                                                   [Aster finkii var. moratus]
                                                   [Aster lowrieanus var. incisus]
                                                   [Aster lowrieanus var. lanceolatus]
                                                   [Aster lowrieanus]
                                                   [Aster plumarius]
                                                   [Aster sagittifolius]
                                                   [Symphyotrichum cordifolium var. furbishiae]
                                                   [Symphyotrichum cordifolium var. lanceolatum]
                                                   [Symphyotrichum cordifolium var. moratum]
                                                   [Symphyotrichum cordifolium var. polycephalum]
                                                   [Symphyotrichum cordifolium var. racemiflorum]
                                                   [Symphyotrichum lowrieanum]
                                                   [Symphyotrichum sagittifolium]
                                             Symphyotrichum defoliatum
                                                   [Aster bernardinus]
                                                   [Aster defoliatus]
                                                   [Aster deserticola]
                                                   [Virgulaster bernardinus]
                                             Symphyotrichum depauperatum
                                                   [Aster depauperatus]
                                                   [Aster ericoides var. pusillus]
                                                   [Aster pilosus var. pusillus]
                                             Symphyotrichum drummondii
                                                   [Aster drummondii]
                                                   [Aster sagittifolius var. drummondii]
                                               Symphyotrichum drummondii var. drummondii
                                                     [Aster drummondii]
                                                     [Aster sagittifolius var. drummondii]
                                               Symphyotrichum drummondii var. texanum
                                                     [Aster drummondii subsp. parviceps]
                                                     [Aster drummondii subsp. texanus]
                                                     [Aster drummondii var. parviceps]
                                                     [Aster drummondii var. texanus]
                                                     [Aster texanus var. parviceps]
                                                     [Aster texanus]
                                                     [Symphyotrichum drummondii var. parviceps]
                                             Symphyotrichum dumosum
                                                   [Aster coridifolius]
                                                   [Aster dumosus var. coridifolius]
                                                   [Aster dumosus var. dodgei]
                                                   [Aster dumosus var. gracilentus]
                                                   [Aster dumosus var. gracilipes]
                                                   [Aster dumosus var. pergracilis]
                                                   [Aster dumosus var. subulifolius]
                                                   [Aster dumosus]
                                                   [Aster gracilipes]
                                                   [Symphyotrichum dumosum var. dodgei]
                                                   [Symphyotrichum dumosum var. gracilipes]
                                                   [Symphyotrichum dumosum var. pergracile]
                                                   [Symphyotrichum dumosum var. strictior]
                                                   [Symphyotrichum dumosum var. subulifolium]
                                               Symphyotrichum dumosum var. dumosum
                                                     [Aster coridifolius]
                                                     [Aster dumosus var. coridifolius]
                                                     [Aster dumosus var. gracilentus]
                                                     [Aster dumosus]
                                             Symphyotrichum eatonii
                                                   [Aster bracteolatus]
                                                   [Aster cordalenus]
                                                   [Aster eatonii]
                                                   [Aster foliaceus var. eatonii]
                                                   [Aster mearnsii]
                                                   [Aster oregonus]
                                                   [Symphyotrichum bracteolatum]
                                             Symphyotrichum elliottii
                                                   [Aster elliottii]
                                                   [Aster puniceus subsp. elliottii]
                                                   [Aster puniceus var. elliottii]
                                                   [Symphyotrichum elliotii]
                                             Symphyotrichum ericoides
                                                   [Aster ericoides var. prostratus]
                                                   [Aster ericoides]
                                                   [Aster exiguus]
                                                   [Aster multiflorus var. exiguus]
                                                   [Aster multiflorus var. prostratus]
                                                   [Aster multiflorus]
                                                   [Aster pilosus]
                                                   [Aster polycephalus]
                                                   [Aster ramosissimus]
                                                   [Chrysopsis villosa/Symphyotrichum ericoides]
                                                   [Heterotheca villosa var. villosa/Symphyotrichum ericoides]
                                                   [Lasallea ericoides]
                                                   [Symphyotrichum ericoides var. prostratum]
                                                   [Virgulus ericoides]
                                               Symphyotrichum ericoides var. ericoides
                                                     [Aster ericoides var. prostratus]
                                                     [Aster ericoides]
                                                     [Aster exiguus]
                                                     [Aster multiflorus var. exiguus]
                                                     [Aster multiflorus var. prostratus]
                                                     [Aster multiflorus]
                                                     [Aster polycephalus]
                                                     [Lasallea ericoides]
                                                     [Symphyotrichum ericoides var. prostratum]
                                                     [Virgulus ericoides]
                                               Symphyotrichum ericoides var. pansum
                                                     [Aster ericoides subsp. pansus]
                                                     [Aster ericoides var. pansus]
                                                     [Aster ericoides var. stricticaulis]
                                                     [Aster multiflorus var. pansus]
                                                     [Aster multiflorus var. stricticaulis]
                                                     [Aster pansus]
                                                     [Aster stricticaulis]
                                                     [Symphyotrichum ericoides var. stricticaule]
                                             Symphyotrichum eulae
                                                   [Aster eulae]
                                             Symphyotrichum falcatum
                                                   [Aster elegantulus]
                                                   [Aster falcatus]
                                                   [Lasallea falcata]
                                                   [Virgulus falcatus]
                                               Symphyotrichum falcatum var. commutatum
                                                     [Aster adsurgens]
                                                     [Aster commutatus var. crassulus]
                                                     [Aster commutatus var. polycephalus]
                                                     [Aster commutatus]
                                                     [Aster cordineri]
                                                     [Aster crassulus]
                                                     [Aster ericoides var. commutatus]
                                                     [Aster falcatus subsp. commutatus]
                                                     [Aster falcatus var. commutatus]
                                                     [Aster falcatus var. crassulus]
                                                     [Aster multiflorus var. commutatus]
                                                     [Aster nahanniensis]
                                                     [Symphyotrichum falcatum var. crassulum]
                                               Symphyotrichum falcatum var. falcatum
                                                     [Aster elegantulus]
                                                     [Aster falcatus]
                                                     [Aster ramulosus]
                                                     [Lasallea falcata]
                                                     [Virgulus falcatus]
                                             Symphyotrichum fendleri
                                                   [Aster fendleri]
                                                   [Virgulus fendleri]
                                             Symphyotrichum finkii
                                                   [Aster finkii]
                                             Symphyotrichum firmum
                                                   [Aster firmus]
                                                   [Aster puniceus subsp. firmus]
                                                   [Aster puniceus var. firmus]
                                                   [Aster puniceus var. lucidulus]
                                             Symphyotrichum foliaceum
                                                   [Aster douglasii]
                                                   [Aster foliaceus]
                                               Symphyotrichum foliaceum var. apricum
                                                     [Aster apricus]
                                                     [Aster foliaceus var. apricus]
                                                     [Aster phyllodes]
                                                     [Aster subspicatus var. apricus]
                                                     [Aster tweedyi]
                                               Symphyotrichum foliaceum var. canbyi
                                                     [Aster foliaceus var. burkei]
                                                     [Aster foliaceus var. canbyi]
                                                     [Aster phyllodes]
                                                     [Aster tweedyi]
                                               Symphyotrichum foliaceum var. cusickii
                                                     [Aster cusickii var. lyallii]
                                                     [Aster cusickii]
                                                     [Aster foliaceus var. cusickii]
                                                     [Symphyotrichum cusickii]
                                               Symphyotrichum foliaceum var. foliaceum
                                                     [Aster foliaceus var. sublinearis]
                                                     [Aster foliaceus]
                                               Symphyotrichum foliaceum var. parryi
                                                     [Aster ascendens var. parryi]
                                                     [Aster diabolicus]
                                                     [Aster foliaceus var. frondeus]
                                                     [Aster foliaceus var. parryi]
                                                     [Aster foliaceus var. subpetiolatus]
                                                     [Aster frondeus]
                                             Symphyotrichum fontinale
                                                   [Aster fontinalis]
                                                   [Aster patens var. floridanus]
                                             Symphyotrichum frondosum
                                                   [Aster frondosus]
                                                   [Brachyactis frondosa]
                                                   [Tripolium frondosum]
                                             Symphyotrichum georgianum
                                                   [Aster georgianus]
                                                   [Aster patens var. georgianus]
                                                   [Virgulus georgianus]
                                                   [Virgulus patens var. georgianus]
                                             Symphyotrichum grandiflorum
                                                   [Aster grandiflorus]
                                                   [Lasallea grandiflora]
                                                   [Virgulus grandiflorus]
                                             Symphyotrichum gravesii
                                                   [Aster gravesii]
                                             Symphyotrichum greatae
                                                   [Aster greatae]
                                             Symphyotrichum hallii
                                                   [Aster chilensis subsp. hallii]
                                                   [Aster hallii]
                                             Symphyotrichum hendersonii
                                                   [Aster cusickii var. lyallii]
                                                   [Aster foliaceus var. lyallii]
                                                   [Aster hendersonii]
                                             Symphyotrichum jessicae
                                                   [Aster jessicae]
                                             Symphyotrichum kralii
                                                   [Aster pinifolius]
                                             Symphyotrichum laeve
                                                   [Aster falcidens]
                                                   [Aster glaucus]
                                                   [Aster laevis var. falcatus]
                                                   [Aster laevis]
                                                   [Aster steeleorum]
                                               Symphyotrichum laeve var. concinnum
                                                     [Aster concinnus]
                                                     [Aster laevis var. concinnus]
                                               Symphyotrichum laeve var. geyeri
                                                     [Aster geyeri]
                                                     [Aster laevis var. geyeri]
                                                     [Aster pickettianus]
                                               Symphyotrichum laeve var. laeve
                                                     [Aster falcidens]
                                                     [Aster laevis var. falcatus]
                                                     [Aster laevis]
                                                     [Aster steeleorum]
                                               Symphyotrichum laeve var. purpuratum
                                                     [Aster attenuatus]
                                                     [Aster laevis var. purpuratus]
                                                     [Aster purpuratus]
                                                     [Aster virgatus]
                                             Symphyotrichum lanceolatum
                                               Symphyotrichum lanceolatum subsp. hesperium
                                               Symphyotrichum lanceolatum subsp. lanceolatum
                                                     [Aster lamarckianus]
                                                     [Aster lanceolatus var. simplex]
                                                     [Aster lanceolatus]
                                                     [Aster laxus]
                                                     [Aster simplex var. estuarinus]
                                                     [Aster simplex var. ramosissimus]
                                                     [Aster simplex]
                                                     [Aster tenuifolius var. ramosissimus]
                                                     [Symphyotrichum simplex]
                                               Symphyotrichum lanceolatum var. hesperium
                                                     [Aster hesperius var. laetevirens]
                                                     [Aster hesperius var. wootonii]
                                                     [Aster hesperius]
                                                     [Aster laetevirens]
                                                     [Aster lanceolatus subsp. hesperius]
                                                     [Aster osterhoutii]
                                                     [Aster wootonii]
                                                     [Symphyotrichum hesperium]
                                               Symphyotrichum lanceolatum var. hirsuticaule
                                                     [Aster lanceolatus var. hirsuticaulis]
                                               Symphyotrichum lanceolatum var. interior
                                                     [Aster interior]
                                                     [Aster lanceolatus subsp. interior]
                                                     [Aster simplex var. interior]
                                               Symphyotrichum lanceolatum var. lanceolatum
                                                     [Aster bellidiflorus]
                                                     [Aster lamarckianus]
                                                     [Aster lanceolatus var. simplex]
                                                     [Aster lanceolatus]
                                                     [Aster laxus]
                                                     [Aster paniculatus var. simplex]
                                                     [Aster paniculatus]
                                                     [Aster simplex var. estuarinus]
                                                     [Aster simplex var. ramosissimus]
                                                     [Aster simplex]
                                                     [Aster tenuifolius var. ramosissimus]
                                                     [Symphyotrichum simplex]
                                               Symphyotrichum lanceolatum var. latifolium
                                                     [Aster lanceolatus var. latifolius]
                                             Symphyotrichum lateriflorum
                                                   [Aster acadiensis]
                                                   [Aster agrostifolius]
                                                   [Aster hirsuticaulis]
                                                   [Aster horizontalis]
                                                   [Aster lateriflorus var. angustifolius]
                                                   [Aster lateriflorus var. flagellaris]
                                                   [Aster lateriflorus var. hirsuticaulis]
                                                   [Aster lateriflorus var. horizontalis]
                                                   [Aster lateriflorus var. indutus]
                                                   [Aster lateriflorus var. pendulus]
                                                   [Aster lateriflorus var. spatelliformis]
                                                   [Aster lateriflorus var. tenuipes]
                                                   [Aster lateriflorus]
                                                   [Aster pendulus]
                                                   [Aster spatelliformis]
                                                   [Solidago lateriflora]
                                                   [Symphyotrichum lateriflorum var. angustifolium]
                                                   [Symphyotrichum lateriflorum var. flagellare]
                                                   [Symphyotrichum lateriflorum var. hirsuticaule]
                                                   [Symphyotrichum lateriflorum var. horizontale]
                                                   [Symphyotrichum lateriflorum var. spatelliforme]
                                                   [Symphyotrichum lateriflorum var. tenuipes]
                                               Symphyotrichum lateriflorum var. lateriflorum
                                                     [Aster hirsuticaulis]
                                                     [Aster lateriflorus var. hirsuticaulis]
                                                     [Aster lateriflorus]
                                                     [Aster vimineus]
                                                     [Solidago lateriflora]
                                                     [Symphyotrichum lateriflorum var. hirsuticaule]
                                             Symphyotrichum lentum
                                                   [Aster chilensis var. lentus]
                                                   [Aster chilensis var. sonomensis]
                                                   [Aster lentus]
                                                   [Aster sonomensis]
                                             Symphyotrichum longulum
                                                   [Aster longulus]
                                             Symphyotrichum molle
                                                   [Aster mollis]
                                             Symphyotrichum nahanniense
                                                   [Aster nahanniensis]
                                             Symphyotrichum novae-angliae
                                                   [Aster novae-angliae]
                                                   [Lasallea novae-angliae]
                                                   [Virgulus novae-angliae]
                                             Symphyotrichum novi-belgii
                                                   [Aster foliaceus var. sublinearis]
                                                   [Aster johannensis]
                                                   [Aster laxifolius]
                                                   [Aster longifolius]
                                                   [Aster novi-belgii subsp. johannensis]
                                                   [Aster novi-belgii var. johannensis]
                                                   [Aster novi-belgii]
                                                   [Aster praealtus]
                                                   [Aster rolandii]
                                                   [Aster salicifolius]
                                                   [Symphyotrichum longifolium]
                                               Symphyotrichum novi-belgii var. crenifolium
                                                     [Aster foliaceus var. subpetiolatus]
                                               Symphyotrichum novi-belgii var. elodes
                                                     [Aster elodes]
                                                     [Aster novi-belgii var. elodes]
                                               Symphyotrichum novi-belgii var. litoreum
                                               Symphyotrichum novi-belgii var. novi-belgii
                                                     [Aster eminens]
                                                     [Aster junceus]
                                                     [Aster longifolius]
                                                     [Aster novi-belgii]
                                                     [Aster salicifolius]
                                                     [Symphyotrichum longifolium]
                                               Symphyotrichum novi-belgii var. tardiflorus
                                                     [Aster novi-belgii subsp. tardiflorus]
                                                     [Aster novi-belgii var. tardiflorus]
                                                     [Aster tardiflorus var. vestitus]
                                                     [Aster tardiflorus]
                                                     [Aster vimineus]
                                               Symphyotrichum novi-belgii var. villicaule
                                                     [Aster gaspensis]
                                                     [Aster johannensis var. villicaulis]
                                                     [Aster johannensis]
                                                     [Aster longifolius var. villicaulis]
                                                     [Aster novi-belgii subsp. johannensis]
                                                     [Aster novi-belgii var. johannensis]
                                                     [Aster novi-belgii var. villicaulis]
                                                     [Aster rolandii]
                                                     [Aster tardiflorus var. vestitus]
                                             Symphyotrichum oblongifolium
                                                   [Aster kumleinii]
                                                   [Aster oblongifolius var. angustatus]
                                                   [Aster oblongifolius var. orientis]
                                                   [Aster oblongifolius var. rigidulus]
                                                   [Aster oblongifolius]
                                                   [Lasallea oblongifolia]
                                                   [Virgulus oblongifolius]
                                             Symphyotrichum ontarionis
                                                   [Aster diffusus var. thyrsoides]
                                                   [Aster lateriflorus var. thyrsoides]
                                                   [Aster missouriensis var. thyrsoides]
                                                   [Aster missouriensis]
                                                   [Aster ontarionis var. glabratus]
                                                   [Aster ontarionis]
                                                   [Aster pantotrichus var. thyrsoides]
                                                   [Aster pantotrichus]
                                                   [Aster tradescantii var. thyrsoides]
                                                   [Symphyotrichum ontarione var. glabratum]
                                                   [Symphyotrichum ontarione]
                                               Symphyotrichum ontarionis var. glabratum
                                                     [Aster ontarionis var. glabratus]
                                             Symphyotrichum oolentangiense
                                                   [Aster azureus var. poaceus]
                                                   [Aster azureus]
                                                   [Aster oolentangiensis var. laevicaulis]
                                                   [Aster oolentangiensis var. poaceus]
                                                   [Aster oolentangiensis]
                                                   [Aster poaceus]
                                                   [Aster vernalis]
                                                   [Symphyotrichum oolentangiense var. poaceum]
                                               Symphyotrichum oolentangiense var. oolentangiense
                                                     [Aster azureus]
                                                     [Aster oolentangiensis var. laevicaulis]
                                                     [Aster oolentangiensis]
                                             Symphyotrichum parviceps
                                                   [Aster depauperatus var. parviceps]
                                                   [Aster ericoides var. parviceps]
                                                   [Aster parviceps]
                                                   [Aster pilosus subsp. parviceps]
                                             Symphyotrichum patens
                                                   [Aster patens]
                                                   [Aster undulatus]
                                                   [Aster virgatus]
                                                   [Lasallea patens]
                                                   [Virgulus patens]
                                               Symphyotrichum patens var. gracile
                                                     [Aster patens var. gracilis]
                                                     [Aster tenuicaulis]
                                                     [Virgulus patens var. gracilis]
                                               Symphyotrichum patens var. patens
                                                     [Aster patens]
                                                     [Lasallea patens]
                                                     [Virgulus patens]
                                               Symphyotrichum patens var. patentissimum
                                                     [Aster continuus]
                                                     [Aster patens var. patentissimus]
                                                     [Aster patentissimus]
                                                     [Aster subsessilis]
                                                     [Virgulus patens var. patentissimus]
                                             Symphyotrichum phlogifolium
                                                   [Aster patens var. phlogifolius]
                                                   [Aster phlogifolius]
                                                   [Virgulus patens var. phlogifolius]
                                             Symphyotrichum pilosum
                                                   [Aster ericoides var. platyphyllus]
                                                   [Aster ericoides var. villosus]
                                                   [Aster juniperinus]
                                                   [Aster pilosus var. demotus]
                                                   [Aster pilosus var. platyphyllus]
                                               Symphyotrichum pilosum var. pilosum
                                                     [Aster ericoides var. platyphyllus]
                                                     [Aster ericoides var. villosus]
                                                     [Aster juniperinus]
                                                     [Aster pilosus var. platyphyllus]
                                                     [Aster pilosus]
                                                     [Aster ramosissimus]
                                                     [Aster villosus]
                                               Symphyotrichum pilosum var. pringlei
                                                     [Aster ericoides var. pringlei]
                                                     [Aster faxonii]
                                                     [Aster pilosus var. demotus]
                                                     [Aster pilosus var. pringlei]
                                                     [Aster polyphyllus]
                                                     [Aster pringlei]
                                             Symphyotrichum plumosum
                                                   [Aster plumosus]
                                             Symphyotrichum porteri
                                                   [Aster ericoides var. strictus]
                                                   [Aster porteri]
                                             Symphyotrichum potosinum
                                                   [Aster lemmonii]
                                                   [Aster potosinus]
                                             Symphyotrichum praealtum
                                                   [Aster coerulescens]
                                                   [Aster eminens]
                                                   [Aster nebraskensis]
                                                   [Aster praealtus var. angustior]
                                                   [Aster praealtus var. nebraskensis]
                                                   [Aster praealtus var. subasper]
                                                   [Aster praealtus var. texicola]
                                                   [Aster subasper]
                                                   [Symphyotrichum praealtum subsp. angustior]
                                                   [Symphyotrichum praealtum var. angustior]
                                                   [Symphyotrichum praealtum var. nebraskense]
                                                   [Symphyotrichum praealtum var. subasperum]
                                                   [Symphyotrichum praealtum var. texicola]
                                               Symphyotrichum praealtum var. praealtum
                                                     [Aster caerulescens]
                                                     [Aster coerulescens]
                                                     [Aster novi-belgii var. litoreus]
                                                     [Aster praealtus var. caerulescens]
                                                     [Aster praealtus var. imbricatior]
                                                     [Aster praealtus var. texicola]
                                                     [Aster praealtus]
                                                     [Aster salicifolius]
                                                     [Symphyotrichum praealtum var. texicola]
                                             Symphyotrichum pratense
                                                   [Aster phyllolepis]
                                                   [Aster pratensis]
                                                   [Aster sericeus var. microphyllus]
                                                   [Lasallea sericea subsp. pratensis]
                                                   [Virgulus pratensis]
                                             Symphyotrichum prenanthoides
                                                   [Aster prenanthoides]
                                             Symphyotrichum priceae
                                                   [Aster kentuckiensis]
                                                   [Aster pilosus var. priceae]
                                                   [Aster priceae]
                                             Symphyotrichum puniceum
                                                   [Aster calderi]
                                                   [Aster conduplicatus]
                                                   [Aster forwoodii]
                                                   [Aster puniceus var. calderi]
                                                   [Aster puniceus var. compactus]
                                                   [Aster puniceus var. demissus]
                                                   [Aster puniceus var. oligocephalus]
                                                   [Aster puniceus var. perlongus]
                                                   [Aster puniceus]
                                                   [Symphyotrichum puniceum var. calderi]
                                               Symphyotrichum puniceum var. puniceum
                                                     [Aster calderi]
                                                     [Aster conduplicatus]
                                                     [Aster firmus]
                                                     [Aster forwoodii]
                                                     [Aster puniceus subsp. firmus]
                                                     [Aster puniceus var. calderi]
                                                     [Aster puniceus var. calvus]
                                                     [Aster puniceus var. compactus]
                                                     [Aster puniceus var. demissus]
                                                     [Aster puniceus var. firmus]
                                                     [Aster puniceus var. lucidulus]
                                                     [Aster puniceus var. oligocephalus]
                                                     [Aster puniceus var. perlongus]
                                                     [Aster puniceus]
                                                     [Symphyotrichum puniceum var. calderi]
                                               Symphyotrichum puniceum var. scabricaule
                                                     [Aster puniceus var. scabricaulis]
                                                     [Aster scabricaulis]
                                             Symphyotrichum pygmaeum
                                                   [Aster pygmaeus]
                                                   [Aster sibiricus subsp. pygmaeus]
                                                   [Aster sibiricus var. pygmaeus]
                                                   [Eurybia pygmaea]
                                             Symphyotrichum racemosum
                                                   [Aster brachypholis]
                                                   [Aster fragilis var. brachypholis]
                                                   [Aster fragilis var. subdumosus]
                                                   [Aster fragilis]
                                                   [Aster racemosus]
                                                   [Aster vimineus var. subdumosus]
                                                   [Aster vimineus]
                                                   [Symphyotrichum racemosum var. subdumosum]
                                             Symphyotrichum retroflexum
                                                   [Aster curtisii]
                                                   [Aster retroflexus]
                                             Symphyotrichum robynsianum
                                                   [Aster longifolius]
                                                   [Aster robynsianus]
                                                   [Symphyotrichum longifolium]
                                             Symphyotrichum salignum
                                                   [Aster strictus]
                                             Symphyotrichum schistosum
                                                   [Aster schistosus]
                                             Symphyotrichum sericeum
                                                   [Aster sericeus]
                                                   [Lasallea sericea]
                                                   [Virgulus sericeus]
                                             Symphyotrichum shortii
                                                   [Aster camptosorus]
                                                   [Aster shortii]
                                             Symphyotrichum simmondsii
                                                   [Aster simmondsii]
                                                   [Aster sulznerae]
                                             Symphyotrichum spathulatum
                                                   [Aster ascendens var. fremontii]
                                                   [Aster delectabilis]
                                                   [Aster fremontii var. parishii]
                                                   [Aster fremontii]
                                                   [Aster occidentalis var. delectabilis]
                                                   [Aster occidentalis var. fremontii]
                                                   [Aster occidentalis var. parishii]
                                                   [Aster occidentalis]
                                                   [Symphyotrichum spathulatum var. fremontii]
                                                   [Tripolium occidentale]
                                               Symphyotrichum spathulatum var. intermedium
                                                     [Aster occidentalis var. intermedius]
                                               Symphyotrichum spathulatum var. spathulatum
                                                     [Aster ascendens var. fremontii]
                                                     [Aster delectabilis]
                                                     [Aster fremontii var. parishii]
                                                     [Aster fremontii]
                                                     [Aster occidentalis var. delectabilis]
                                                     [Aster occidentalis var. fremontii]
                                                     [Aster occidentalis var. parishii]
                                                     [Aster occidentalis]
                                                     [Aster spathulatus]
                                                     [Symphyotrichum spathulatum var. fremontii]
                                                     [Tripolium occidentale]
                                               Symphyotrichum spathulatum var. yosemitanum
                                                     [Aster ascendens var. yosemitanus]
                                                     [Aster occidentalis var. yosemitanus]
                                                     [Aster paludicola]
                                                     [Aster yosemitanus]
                                             Symphyotrichum subgeminatum
                                                   [Aster foliaceus var. subgeminatus]
                                                   [Aster subgeminatus]
                                             Symphyotrichum subspicatum
                                                   [Aster ciliolatus var. maccallae]
                                                   [Aster grayi]
                                                   [Aster maccallae]
                                                   [Aster oregonum]
                                                   [Aster subspicatus var. grayi]
                                                   [Aster subspicatus]
                                                   [Symphyotrichum ciliolatum var. maccallae]
                                                   [Symphyotrichum subspicatum var. grayi]
                                                   [Tripolium oregonum]
                                               Symphyotrichum subspicatum var. subspicatum
                                                     [Aster douglasii]
                                                     [Aster oregonum]
                                                     [Aster subspicatus]
                                                     [Tripolium oregonum]
                                             Symphyotrichum subulatum
                                                   [Aster exilis var. australis]
                                                   [Aster subulatus var. australis]
                                                   [Aster subulatus var. euroauster]
                                                   [Aster subulatus var. obtusifolius]
                                                   [Aster subulatus]
                                                   [Erigeron linifolius]
                                                   [Tripolium subulatum]
                                               Symphyotrichum subulatum var. elongatum
                                                     [Aster subulatus var. elongatus]
                                                     [Symphyotrichum bahamense]
                                               Symphyotrichum subulatum var. ligulatum
                                                     [Aster divaricatus]
                                                     [Symphyotrichum divaricatum]
                                               Symphyotrichum subulatum var. parviflorum
                                                     [Aster exilis]
                                                     [Aster inconspicuus]
                                                     [Aster neomexicanus]
                                                     [Aster subulatus var. cubensis]
                                                     [Aster subulatus var. ligulatus]
                                                     [Symphyotrichum expansum]
                                                     [Tripolium subulatum var. parviflorum]
                                               Symphyotrichum subulatum var. squamatum
                                                     [Aster squamatus]
                                                     [Symphyotrichum squamatum]
                                             Symphyotrichum tardiflorum
                                                   [Aster novi-belgii subsp. tardiflorus]
                                                   [Aster novi-belgii var. tardiflorus]
                                                   [Aster tardiflorus]
                                                   [Symphyotrichum novi-belgii var. tardiflorum]
                                             Symphyotrichum tenuifolium
                                                   [Aster junceus]
                                                   [Aster tenuifolius]
                                               Symphyotrichum tenuifolium var. aphyllum
                                                     [Aster bracei]
                                                     [Aster tenuifolius var. aphyllus]
                                                     [Symphyotrichum bracei]
                                             Symphyotrichum tradescantii
                                                   [Aster dumosus var. strictior]
                                                   [Aster parviflorus]
                                                   [Aster saxatilis]
                                                   [Aster tradescantii var. saxatilis]
                                                   [Aster tradescantii]
                                                   [Aster vimineus var. saxatilis]
                                             Symphyotrichum turbinellum
                                                   [Aster turbinellus]
                                             Symphyotrichum undulatum
                                                   [Aster asperifolius]
                                                   [Aster claviger]
                                                   [Aster corrigiatus]
                                                   [Aster diversifolius]
                                                   [Aster gracilescens]
                                                   [Aster linguiformis]
                                                   [Aster loriformis]
                                                   [Aster mohrii]
                                                   [Aster proteus]
                                                   [Aster sylvestris]
                                                   [Aster triangularis]
                                                   [Aster truellius]
                                                   [Aster undulatus var. asperulus]
                                                   [Aster undulatus var. diversifolius]
                                                   [Aster undulatus var. loriformis]
                                                   [Aster undulatus var. triangularis]
                                                   [Aster undulatus]
                                             Symphyotrichum urophyllum
                                                   [Aster hirtellus]
                                                   [Aster sagittifolius var. urophyllus]
                                                   [Aster sagittifolius]
                                                   [Aster urophyllus]
                                             Symphyotrichum versicolor
                                             Symphyotrichum walteri
                                                   [Aster squarrosus]
                                                   [Aster walteri]
                                                   [Lasallea walteri]
                                                   [Virgulus walteri]
                                             Symphyotrichum welshii
                                                   [Aster welshii]
                                             Symphyotrichum woldenii
                                                   [Aster woldenii]
                                             Symphyotrichum yukonense
                                                   [Aster yukonensis]
                                                   [Virgulus yukonensis]
                                     Synedrella
                                             Synedrella nodiflora
                                                   [Verbesina nodiflora]
                                     Synedrellopsis
                                             Synedrellopsis grisebachii
                                     Syntrichopappus
                                             Syntrichopappus fremontii
                                             Syntrichopappus lemmonii
                                     Tagetes
                                             Tagetes elongata
                                                   [Tagetes corymbosa]
                                             Tagetes erecta
                                                   [Tagetes major]
                                                   [Tagetes patula]
                                             Tagetes filifolia
                                                   [Tagetes pusilla]
                                             Tagetes lemmonii
                                                   [Tagetes alamensis]
                                             Tagetes lunulata
                                                   [Tagetes signata]
                                             Tagetes micrantha
                                                   [Tagetes fragrantissima]
                                             Tagetes minima
                                             Tagetes minuta
                                                   [Tagetes bonariensis]
                                                   [Tagetes glandulifera]
                                                   [Tagetes glandulosa]
                                                   [Tagetes porophylla]
                                             Tagetes palmeri
                                                   [Tagetes alamensis]
                                             Tagetes remotiflora
                                             Tagetes tenuifolia
                                     Tamaulipa
                                             Tamaulipa azurea
                                                   [Eupatorium azureum]
                                     Tanacetum
                                             Tanacetum balsamita
                                                   [Balsamita major var. tanacetoides]
                                                   [Balsamita major]
                                                   [Chrysanthemum balsamita var. tanacetoides]
                                                   [Chrysanthemum balsamita]
                                                   [Pyrethrum majus]
                                             Tanacetum bipinnatum
                                               Tanacetum bipinnatum subsp. bipinnatum
                                                     [Chrysanthemum bipinnatum subsp. huronense]
                                                     [Chrysanthemum bipinnatum]
                                                     [Tanacetum boreale]
                                                     [Tanacetum camphoratum]
                                                     [Tanacetum douglasii]
                                                     [Tanacetum huronense var. bifarium]
                                                     [Tanacetum huronense var. floccosum]
                                                     [Tanacetum huronense var. johannense]
                                                     [Tanacetum huronense]
                                               Tanacetum bipinnatum subsp. huronense
                                                     [Chrysanthemum bipinnatum subsp. huronense]
                                                     [Tanacetum huronense var. bifarium]
                                                     [Tanacetum huronense var. floccosum]
                                                     [Tanacetum huronense var. johannense]
                                                     [Tanacetum huronense var. terrae-novae]
                                                     [Tanacetum huronense]
                                             Tanacetum coccineum
                                                   [Chrysanthemum coccineum]
                                                   [Chrysanthemum roseum]
                                               Tanacetum coccineum subsp. coccineum
                                                     [Chrysanthemum coccineum]
                                                     [Chrysanthemum roseum]
                                             Tanacetum corymbosum
                                                   [Chrysanthemum corymbosum]
                                               Tanacetum corymbosum subsp. corymbosum
                                                     [Chrysanthemum corymbosum]
                                             Tanacetum parthenium
                                                   [Matricaria parthenium]
                                             Tanacetum vulgare
                                                   [Tanacetum boreale]
                                                   [Tanacetum vulgare var. crispum]
                                               Tanacetum vulgare subsp. vulgare
                                                     [Tanacetum vulgare var. crispum]
                                     Taonabo
                                     Taraxacum
                                             Taraxacum alaskanum
                                                   [Taraxacum lyratum]
                                             Taraxacum amphiphron
                                             Taraxacum arcticum
                                             Taraxacum brachyceras
                                             Taraxacum californicum
                                             Taraxacum campylodes
                                             Taraxacum carneocoloratum
                                             Taraxacum ceratophorum
                                                   [Taraxacum arctogenum]
                                                   [Taraxacum carthamopsis]
                                                   [Taraxacum dumetorum]
                                                   [Taraxacum eriophorum]
                                                   [Taraxacum eurylepium]
                                                   [Taraxacum hyperboreum]
                                                   [Taraxacum integratum]
                                                   [Taraxacum lacerum]
                                                   [Taraxacum longii]
                                                   [Taraxacum mackenziense]
                                                   [Taraxacum malteanum]
                                                   [Taraxacum maurolepium]
                                                   [Taraxacum ovinum]
                                                   [Taraxacum pellianum]
                                                   [Taraxacum pseudonorvegicum]
                                                   [Taraxacum umbrinum]
                                             Taraxacum croceum
                                                   [Taraxacum ambigens]
                                                   [Taraxacum atroglaucum]
                                                   [Taraxacum curvidens]
                                                   [Taraxacum davidssonii]
                                                   [Taraxacum dilutisquameum]
                                                   [Taraxacum lapponicum]
                                                   [Taraxacum latispinulosum]
                                                   [Taraxacum naevosum]
                                                   [Taraxacum pleniflorum]
                                                   [Taraxacum torngatense]
                                             Taraxacum cyclocentrum
                                             Taraxacum devians
                                             Taraxacum disseminatum
                                             Taraxacum erythrospermum
                                                   [Leontodon erythrospermum]
                                             Taraxacum firmum
                                             Taraxacum gilliesii
                                             Taraxacum hyparcticum
                                             Taraxacum kok-saghyz
                                             Taraxacum lacistophyllum
                                             Taraxacum lateritium
                                             Taraxacum latilobum
                                             Taraxacum laurentianum
                                             Taraxacum officinale
                                                   [Leontodon taraxacum]
                                               Taraxacum officinale subsp. ceratophorum
                                                     [Taraxacum ambigens var. flutius]
                                                     [Taraxacum ambigens]
                                                     [Taraxacum arctogenum]
                                                     [Taraxacum carthamopsis]
                                                     [Taraxacum dumetorum]
                                                     [Taraxacum eurylepium]
                                                     [Taraxacum hyperboreum]
                                                     [Taraxacum integratum]
                                                     [Taraxacum lacerum]
                                                     [Taraxacum lapponicum]
                                                     [Taraxacum latispinulosum]
                                                     [Taraxacum longii]
                                                     [Taraxacum malteanum]
                                                     [Taraxacum maurolepium]
                                                     [Taraxacum mitratum]
                                                     [Taraxacum multesimum]
                                                     [Taraxacum naevosum]
                                                     [Taraxacum ovinum]
                                                     [Taraxacum paucisquamosum]
                                                     [Taraxacum pellianum]
                                                     [Taraxacum pseudonorvegicum]
                                                     [Taraxacum torngatense]
                                                     [Taraxacum umbrinum]
                                               Taraxacum officinale subsp. officinale
                                                     [Leontodon latiloba]
                                                     [Leontodon taraxacum]
                                                     [Taraxacum atroglaucum]
                                                     [Taraxacum curvidens]
                                                     [Taraxacum dahlstedtii]
                                                     [Taraxacum davidssonii]
                                                     [Taraxacum dilutisquameum]
                                                     [Taraxacum islandiciforme]
                                                     [Taraxacum officinale subsp. vulgare]
                                                     [Taraxacum officinale var. palustre]
                                                     [Taraxacum palustre var. vulgare]
                                                     [Taraxacum pleniflorum]
                                                     [Taraxacum vagans]
                                                     [Taraxacum vulgare]
                                             Taraxacum palustre
                                             Taraxacum phymatocarpum
                                                   [Taraxacum mackenziense]
                                                   [Taraxacum pumilum]
                                             Taraxacum purpuridens
                                             Taraxacum retroflexum
                                             Taraxacum rhodolepis
                                             Taraxacum scanicum
                                                   [Taraxacum laevigatum]
                                             Taraxacum scopulorum
                                             Taraxacum sibiricum
                                             Taraxacum spectabile
                                             Taraxacum stenoglossum
                                                   [Taraxacum dahlstedtii]
                                             Taraxacum trigonolobum
                                             Taraxacum turfosum
                                             Taraxacum undulatum
                                             Taraxacum xanthostigma
                                     Taraxia
                                     Tephroseris
                                             Tephroseris frigida
                                                   [Senecio atropurpureus subsp. frigidus]
                                                   [Senecio atropurpureus var. ulmeri]
                                                   [Senecio frigidus]
                                                   [Tephroseris atropurpurea subsp. frigida]
                                             Tephroseris integrifolia
                                               Tephroseris integrifolia subsp. atropurpurea
                                                     [Senecio atropurpureus]
                                                     [Tephroseris atropurpurea subsp. atropurpurea]
                                                     [Tephroseris atropurpurea]
                                               Tephroseris integrifolia subsp. tundricola
                                                     [Senecio tundricola]
                                                     [Tephroseris tundricola]
                                             Tephroseris kjellmanii
                                                   [Senecio atropurpureus subsp. tomentosus]
                                                   [Senecio atropurpureus var. dentatus]
                                                   [Senecio kjellmanii]
                                                   [Senecio tichomirovii]
                                                   [Tephroseris atropurpurea subsp. tomentosa]
                                             Tephroseris lindstroemii
                                                   [Senecio bivestitus]
                                                   [Senecio fuscatus]
                                                   [Senecio lindstroemii]
                                                   [Senecio tundricola]
                                                   [Tephroseris tundricola subsp. lindstroemii]
                                                   [Tephroseris tundricola var. lindstroemii]
                                             Tephroseris palustris
                                                   [Cineraria congesta]
                                                   [Senecio congestus subsp. palustris]
                                                   [Senecio congestus var. palustris]
                                                   [Senecio congestus var. tonsus]
                                                   [Senecio congestus]
                                                   [Senecio palustris]
                                                   [Tephroseris palustris subsp. congesta]
                                             Tephroseris yukonensis
                                                   [Senecio alaskanus]
                                                   [Senecio yukonensis]
                                     Tessaria
                                     Tetradymia
                                             Tetradymia argyraea
                                             Tetradymia axillaris
                                               Tetradymia axillaris var. axillaris
                                               Tetradymia axillaris var. longispina
                                                     [Tetradymia spinosa var. longispina]
                                             Tetradymia canescens
                                                   [Tetradymia canescens var. inermis]
                                             Tetradymia comosa
                                             Tetradymia filifolia
                                             Tetradymia glabrata
                                             Tetradymia nuttallii
                                             Tetradymia spinosa
                                             Tetradymia stenolepis
                                             Tetradymia tetrameres
                                                   [Tetradymia comosa subsp. tetrameres]
                                     Tetragamestus
                                     Tetragonotheca
                                             Tetragonotheca helianthoides
                                                   [Gonotheca helianthoides]
                                             Tetragonotheca ludoviciana
                                                   [Halea ludoviciana]
                                             Tetragonotheca repanda
                                                   [Halea repanda]
                                             Tetragonotheca texana
                                     Tetramolopium
                                             Tetramolopium arenarium
                                               Tetramolopium arenarium subsp. arenarium
                                                     [Tetramolopium arenarium var. confertum]
                                               Tetramolopium arenarium subsp. laxum
                                                     [Tetramolopium arenarium var. dentatum]
                                               Tetramolopium arenarium var. arenarium
                                             Tetramolopium capillare
                                                   [Luteidiscus capillaris]
                                                   [Senecio capillaris]
                                             Tetramolopium consanguineum
                                               Tetramolopium consanguineum subsp. consanguineum
                                               Tetramolopium consanguineum subsp. leptophyllum
                                                     [Tetramolopium consanguineum var. kauense]
                                                     [Tetramolopium consanguineum var. leptophyllum]
                                             Tetramolopium conyzoides
                                                   [Tetramolopium conyzoides var. dentatum]
                                             Tetramolopium filiforme
                                               Tetramolopium filiforme var. filiforme
                                               Tetramolopium filiforme var. polyphyllum
                                                     [Tetramolopium polyphyllum]
                                             Tetramolopium humile
                                               Tetramolopium humile subsp. haleakalae
                                               Tetramolopium humile subsp. humile
                                                     [Tetramolopium humile var. sublaeve]
                                               Tetramolopium humile var. humile
                                                     [Tetramolopium humile var. skottsbergii]
                                             Tetramolopium lepidotum
                                               Tetramolopium lepidotum subsp. arbusculum
                                                     [Tetramolopium arbusculum]
                                               Tetramolopium lepidotum subsp. lepidotum
                                                     [Tetramolopium lepidotum var. luxurians]
                                             Tetramolopium remyi
                                                   [Vittadinia remyi]
                                             Tetramolopium rockii
                                                   [Luteidiscus rockii]
                                               Tetramolopium rockii var. calcisabulorum
                                                     [Luteidiscus calcisabulorus]
                                                     [Tetramolopium calcisabulorum]
                                               Tetramolopium rockii var. rockii
                                                     [Luteidiscus rockii]
                                             Tetramolopium sylvae
                                             Tetramolopium tenerrimum
                                                   [Aster tenerrimus]
                                     Tetraneuris
                                             Tetraneuris acaulis
                                                   [Actinella acaulis]
                                                   [Hymenoxys acaulis]
                                                   [Tetraneuris simplex]
                                               Tetraneuris acaulis var. acaulis
                                                     [Actinella acaulis]
                                                     [Hymenoxys acaulis]
                                                     [Tetraneuris simplex]
                                               Tetraneuris acaulis var. arizonica
                                                     [Actinea acaulis var. arizonica]
                                                     [Hymenoxys acaulis var. arizonica]
                                                     [Hymenoxys acaulis var. nana]
                                                     [Tetraneuris acaulis var. nana]
                                               Tetraneuris acaulis var. caespitosa
                                                     [Hymenoxys acaulis var. caespitosa]
                                                     [Hymenoxys acaulis var. lanata]
                                                     [Tetraneuris brevifolia]
                                               Tetraneuris acaulis var. epunctata
                                                     [Hymenoxys acaulis var. epunctata]
                                                     [Tetraneuris epunctata]
                                             Tetraneuris argentea
                                                   [Actinella argentea]
                                                   [Hymenoxys argentea]
                                             Tetraneuris brandegeei
                                                   [Hymenoxys brandegeei]
                                                   [Rydbergia brandegeei]
                                             Tetraneuris herbacea
                                                   [Actinea herbacea]
                                                   [Hymenoxys acaulis var. glabra]
                                             Tetraneuris ivesiana
                                                   [Hymenoxys acaulis var. ivesiana]
                                                   [Hymenoxys argentea var. ivesiana]
                                                   [Hymenoxys ivesiana]
                                                   [Tetraneuris mancosensis]
                                                   [Tetraneuris pilosa]
                                             Tetraneuris linearifolia
                                                   [Hymenoxys linearifolia]
                                               Tetraneuris linearifolia var. arenicola
                                               Tetraneuris linearifolia var. linearifolia
                                                     [Hymenoxys linearifolia]
                                             Tetraneuris scaposa
                                                   [Hymenoxys glabra]
                                                   [Hymenoxys scaposa var. linearis]
                                                   [Hymenoxys scaposa var. villosa]
                                                   [Hymenoxys scaposa]
                                                   [Tetraneuris fastigiata]
                                                   [Tetraneuris glabra]
                                                   [Tetraneuris scaposa var. linearis]
                                                   [Tetraneuris scaposa var. villosa]
                                                   [Tetraneuris stenophylla]
                                               Tetraneuris scaposa var. argyrocaulon
                                                     [Hymenoxys scaposa var. argyrocaulon]
                                               Tetraneuris scaposa var. scaposa
                                                     [Hymenoxys glabra]
                                                     [Hymenoxys scaposa var. glabra]
                                                     [Hymenoxys scaposa]
                                                     [Tetraneuris fastigiata]
                                                     [Tetraneuris glabra]
                                                     [Tetraneuris stenophylla]
                                             Tetraneuris torreyana
                                                   [Hymenoxys depressa]
                                                   [Hymenoxys lapidicola]
                                                   [Hymenoxys torreyana]
                                                   [Tetraneuris depressa]
                                             Tetraneuris turneri
                                                   [Hymenoxys turneri]
                                     Tetranthera
                                     Thelesperma
                                             Thelesperma ambiguum
                                                   [Thelesperma fraternum]
                                                   [Thelesperma megapotamicum var. ambiguum]
                                             Thelesperma burridgeanum
                                             Thelesperma filifolium
                                                   [Thelesperma filifolium var. intermedium]
                                                   [Thelesperma intermedium]
                                                   [Thelesperma trifidum]
                                               Thelesperma filifolium var. filifolium
                                                     [Thelesperma trifidum]
                                             Thelesperma flavodiscum
                                             Thelesperma longipes
                                             Thelesperma megapotamicum
                                                   [Bidens megapotamica]
                                                   [Thelesperma gracile]
                                             Thelesperma nuecense
                                             Thelesperma simplicifolium
                                                   [Thelesperma curvicarpum]
                                             Thelesperma subnudum
                                                   [Thelesperma caespitosum]
                                                   [Thelesperma marginatum]
                                                   [Thelesperma pubescens]
                                                   [Thelesperma subnudum var. alpinum]
                                                   [Thelesperma subnudum var. marginatum]
                                               Thelesperma subnudum var. subnudum
                                     Thurovia
                                             Thurovia triflora
                                                   [Gutierrezia triflora]
                                     Thyella
                                     Thymophylla
                                             Thymophylla acerosa
                                                   [Dyssodia acerosa]
                                             Thymophylla aurea
                                                   [Dyssodia aurea]
                                                   [Lowellia aurea]
                                               Thymophylla aurea var. aurea
                                                     [Dyssodia aurea]
                                                     [Lowellia aurea]
                                               Thymophylla aurea var. polychaeta
                                                     [Dyssodia aurea var. polychaeta]
                                                     [Dyssodia polychaeta]
                                                     [Thymophylla polychaeta]
                                             Thymophylla concinna
                                                   [Dyssodia concinna]
                                             Thymophylla micropoides
                                                   [Dyssodia micropoides]
                                             Thymophylla pentachaeta
                                                   [Dyssodia pentachaeta]
                                                   [Hymenatherum pentachaetum]
                                               Thymophylla pentachaeta var. pentachaeta
                                                     [Dyssodia pentachaeta]
                                                     [Hymenatherum pentachaetum]
                                             Thymophylla setifolia
                                                   [Dyssodia setifolia]
                                               Thymophylla setifolia var. radiata
                                                     [Dyssodia setifolia var. greggii]
                                                     [Dyssodia setifolia var. radiata]
                                             Thymophylla tenuiloba
                                                   [Dyssodia tenuiloba]
                                               Thymophylla tenuiloba var. tenuiloba
                                                     [Dyssodia tenuiloba]
                                               Thymophylla tenuiloba var. texana
                                                     [Dyssodia tenuiloba var. texana]
                                                     [Dyssodia texana]
                                               Thymophylla tenuiloba var. treculii
                                                     [Dyssodia tenuiloba var. treculii]
                                                     [Dyssodia treculii]
                                               Thymophylla tenuiloba var. wrightii
                                                     [Dyssodia tenuiloba subsp. wrightii]
                                                     [Dyssodia wrightii]
                                             Thymophylla tephroleuca
                                                   [Dyssodia tephroleuca]
                                     Tithonia
                                             Tithonia diversifolia
                                                   [Mirasolia diversifolia]
                                             Tithonia rotundifolia
                                                   [Tagetes rotundifolia]
                                                   [Tithonia speciosa]
                                             Tithonia thurberi
                                     Tithymalopsis
                                     Tithymalus
                                     Tium
                                     Toiyabea
                                             Toiyabea alpina
                                                   [Haplopappus alpinus]
                                                   [Tonestus alpinus]
                                     Tolpis
                                             Tolpis barbata
                                                   [Crepis barbata]
                                             Tolpis umbellata
                                     Tonestus
                                             Tonestus eximius
                                                   [Haplopappus eximius]
                                             Tonestus graniticus
                                                   [Haplopappus graniticus]
                                             Tonestus lyallii
                                                   [Haplopappus lyallii]
                                             Tonestus pygmaeus
                                                   [Haplopappus pygmaeus]
                                     Tontanea
                                     Townsendia
                                             Townsendia annua
                                             Townsendia aprica
                                                   [Townsendia jonesii var. lutea]
                                             Townsendia condensata
                                                   [Townsendia anomala]
                                                   [Townsendia condensata var. anomala]
                                               Townsendia condensata var. condensata
                                             Townsendia eximia
                                                   [Townsendia vreelandii]
                                             Townsendia exscapa
                                                   [Aster exscapus]
                                                   [Townsendia intermedia]
                                                   [Townsendia sericea]
                                             Townsendia fendleri
                                             Townsendia florifer
                                                   [Townsendia florifer var. watsonii]
                                                   [Townsendia florifera var. watsonii]
                                             Townsendia florifera
                                                   [Townsendia florifera var. watsonii]
                                             Townsendia formosa
                                                   [Townsendia pinetorum]
                                             Townsendia glabella
                                             Townsendia grandiflora
                                             Townsendia gypsophila
                                             Townsendia hookeri
                                                   [Townsendia nuttallii]
                                             Townsendia incana
                                                   [Townsendia arizonica]
                                             Townsendia jonesii
                                                   [Townsendia mensana var. jonesii]
                                               Townsendia jonesii var. jonesii
                                                     [Townsendia mensana var. jonesii]
                                               Townsendia jonesii var. tumulosa
                                             Townsendia leptotes
                                                   [Townsendia sericea var. leptotes]
                                             Townsendia mensana
                                             Townsendia microcephala
                                             Townsendia mimina
                                                   [Townsendia alpigena var. minima]
                                                   [Townsendia montana var. minima]
                                             Townsendia montana
                                                   [Townsendia alpigena var. alpigena]
                                                   [Townsendia alpigena var. caelilinensis]
                                                   [Townsendia alpigena]
                                                   [Townsendia montana var. caelilinensis]
                                             Townsendia parryi
                                             Townsendia rothrockii
                                             Townsendia scapigera
                                             Townsendia smithii
                                             Townsendia spathulata
                                             Townsendia strigosa
                                             Townsendia texensis
                                     Tracyina
                                             Tracyina rostrata
                                     Tradescantella
                                     Tragopogon
                                             Tragopogon crantzii
                                             Tragopogon dubius
                                                   [Tragopogon dubius/lamottei]
                                                   [Tragopogon dubius/pratensis]
                                                   [Tragopogon major]
                                               Tragopogon dubius subsp. major
                                             Tragopogon floccosus
                                             Tragopogon lamottei
                                                   [Tragopogon dubius/lamottei]
                                                   [Tragopogon pratensis subsp. orientalis]
                                             Tragopogon mirabilis
                                             Tragopogon mirus
                                             Tragopogon miscellus
                                             Tragopogon neohybridus
                                             Tragopogon orientalis
                                                   [Tragopogon pratensis subsp. orientalis]
                                             Tragopogon porrifolius
                                             Tragopogon pratensis
                                                   [Tragopogon dubius/pratensis]
                                     Trichocoronis
                                             Trichocoronis wrightii
                                                   [Trichocoronis riparia]
                                               Trichocoronis wrightii var. wrightii
                                     Tricholepis
                                             Tricholepis elongata
                                                   [Tricholepis nigrescens]
                                     Trichoptilium
                                             Trichoptilium incisum
                                     Tridax
                                             Tridax procumbens
                                     Triniteurybia
                                             Triniteurybia aberrans
                                                   [Haplopappus aberrans]
                                                   [Macronema aberrans]
                                                   [Tonestus aberrans]
                                     Tripleurospermum
                                             Tripleurospermum hookeri
                                                   [Matricaria hookeri]
                                                   [Matricaria maritima subsp. phaeocephala]
                                                   [Tripleurospermum maritimum subsp. phaeocephalum]
                                                   [Tripleurospermum phaeocephalum]
                                             Tripleurospermum inodorum
                                                   [Chamomilla inodora]
                                                   [Matricaria inodora]
                                                   [Matricaria maritima subsp. inodora]
                                                   [Matricaria maritima var. agrestis]
                                                   [Matricaria maritima]
                                                   [Matricaria perforata]
                                             Tripleurospermum maritimum
                                               Tripleurospermum maritimum subsp. maritimum
                                                     [Chamomilla maritima]
                                                     [Matricaria maritima var. nana]
                                                     [Matricaria maritima]
                                             Tripleurospermum perforatum
                                                   [Chamomilla inodora]
                                                   [Matricaria inodora]
                                                   [Matricaria maritima subsp. inodora]
                                                   [Matricaria maritima var. agrestis]
                                                   [Matricaria perforata]
                                     Tripolium
                                             Tripolium pannonicum
                                                   [Aster tripolium subsp. pannonicus]
                                                   [Aster tripolium]
                                     Trixis
                                             Trixis californica
                                               Trixis californica var. californica
                                             Trixis inula
                                                   [Trixis radialis]
                                     Tussilago
                                             Tussilago farfara
                                     Uropappus
                                     Urospermum
                                             Urospermum picroides
                                     Urostachys
                                     Urostemon
                                             Urostemon kirkii
                                                   [Aster retroflexus]
                                     Vanclevea
                                     Varilla
                                             Varilla texana
                                     Venegasia
                                             Venegasia carpesioides
                                     Venidium
                                     Verbesina
                                             Verbesina alata
                                                   [Hamulium alatum]
                                                   [Tepion alatum]
                                             Verbesina alternifolia
                                                   [Actinomeris alternifolia]
                                                   [Actinomeris oppositifolia]
                                                   [Ridan alternifolia]
                                             Verbesina aristata
                                                   [Actinomeris nudicaulis]
                                                   [Helianthus aristatus]
                                                   [Pterophyton aristatum]
                                                   [Verbesina nudicaulis]
                                             Verbesina chapmanii
                                             Verbesina dissita
                                             Verbesina diversifolia
                                                   [Conyza lobata]
                                             Verbesina encelioides
                                                   [Verbesina encelioides subsp. exauriculata]
                                                   [Verbesina encelioides var. exauriculata]
                                                   [Verbesina exauriculata]
                                                   [Ximenesia encelioides]
                                                   [Ximenesia exauriculata]
                                                   [Ximenesia microptera]
                                               Verbesina encelioides subsp. encelioides
                                                     [Ximenesia encelioides var. cana]
                                                     [Ximenesia encelioides]
                                                     [Ximenesia microptera]
                                             Verbesina helianthoides
                                                   [Actinomeris helianthoides var. elliottii]
                                                   [Actinomeris helianthoides var. nuttallii]
                                                   [Actinomeris helianthoides]
                                                   [Actinomeris oppositifolia]
                                                   [Phaethusa helianthoides]
                                                   [Pterophyton helianthoides]
                                             Verbesina heterophylla
                                                   [Actinomeris heterophylla]
                                                   [Actinomeris pauciflora]
                                                   [Pterophyton heterophyllum]
                                                   [Pterophyton pauciflorum]
                                                   [Verbesina warei]
                                             Verbesina lindheimeri
                                             Verbesina longifolia
                                                   [Actinomeris longifolia]
                                             Verbesina microptera
                                                   [Verbesina microptera var. mollissima]
                                                   [Verbesina texana]
                                             Verbesina nana
                                                   [Wootonella nana]
                                                   [Ximenesia encelioides var. nana]
                                                   [Ximenesia nana]
                                             Verbesina occidentalis
                                                   [Phaethusa occidentalis]
                                             Verbesina oreophila
                                             Verbesina pauciflora
                                             Verbesina rothrockii
                                             Verbesina virginica
                                                   [Phaethusa laciniata]
                                                   [Phaethusa virginica]
                                                   [Verbesina sinuata]
                                                   [Verbesina virginica var. laciniata]
                                               Verbesina virginica var. virginica
                                                     [Phaethusa virginica]
                                             Verbesina walteri
                                                   [Ridan paniculata]
                                     Vernonanthura
                                             Vernonanthura patens
                                                   [Cacalia suaveolens]
                                     Vernonia
                                             Vernonia acaulis
                                             Vernonia angustifolia
                                                   [Vernonia altissima]
                                                   [Vernonia angustifolia subsp. mohrii]
                                                   [Vernonia angustifolia subsp. scaberrima]
                                                   [Vernonia angustifolia var. mohrii]
                                                   [Vernonia angustifolia var. scaberrima]
                                                   [Vernonia recurva]
                                                   [Vernonia scaberrima]
                                               Vernonia angustifolia subsp. angustifolia
                                             Vernonia arkansana
                                                   [Vernonia crinita]
                                             Vernonia baldwinii
                                                   [Vernonia baldwinii subsp. interior]
                                                   [Vernonia interior]
                                               Vernonia baldwinii subsp. baldwinii
                                             Vernonia blodgettii
                                             Vernonia concinna
                                             Vernonia dissimilis
                                             Vernonia diversifolia
                                               Vernonia diversifolia subsp. diversifolia
                                                     [Cacalia diversifolia]
                                             Vernonia fasciculata
                                                   [Vernonia fasciculata subsp. corymbosa]
                                                   [Vernonia fasciculata var. corymbosa]
                                               Vernonia fasciculata subsp. fasciculata
                                             Vernonia flaccidifolia
                                             Vernonia georgiana
                                             Vernonia gigantea
                                                   [Vernonia altissima var. lilacina]
                                                   [Vernonia altissima var. taeniotricha]
                                                   [Vernonia gigantea subsp. ovalifolia]
                                                   [Vernonia ovalifolia]
                                               Vernonia gigantea subsp. gigantea
                                                     [Vernonia altissima var. lilacina]
                                                     [Vernonia altissima var. taeniotricha]
                                                     [Vernonia altissima]
                                             Vernonia glauca
                                                   [Vernonia noveboracensis var. tomentosa]
                                             Vernonia guadalupensis
                                             Vernonia illinoensis
                                             Vernonia larsenii
                                                   [Vernonia lindheimeri var. leucophylla]
                                             Vernonia lettermannii
                                             Vernonia lindheimeri
                                             Vernonia marginata
                                                   [Vernonia marginata var. tenuifolia]
                                             Vernonia missurica
                                                   [Vernonia aborigina]
                                             Vernonia noveboracensis
                                                   [Vernonia harperi]
                                             Vernonia peralta
                                             Vernonia proctori
                                             Vernonia pulchella
                                             Vernonia texana
                                             Vernonia vulturina
                                     Vesicarpa
                                     Vesiculina
                                     Viguiera
                                             Viguiera dentata
                                                   [Helianthus dentatus]
                                                   [Viguiera dentata var. lancifolia]
                                               Viguiera dentata var. dentata
                                                     [Helianthus dentatus]
                                     Vilfa
                                     Vittadinia
                                             Vittadinia gracilis
                                                   [Aster humilis]
                                     Volutaria
                                             Volutaria lippii
                                               Volutaria lippii subsp. lippii
                                                     [Centaurea muricata]
                                             Volutaria muricata
                                                   [Cyanopsis muricata]
                                     Wedelia
                                             Wedelia acapulcensis
                                               Wedelia acapulcensis var. hispida
                                                     [Wedelia hispida]
                                                     [Zexmenia hispida]
                                             Wedelia calycina
                                                   [Stemmodontia calycina]
                                                   [Wedelia calycina var. parviflora]
                                                   [Wedelia parviflora]
                                             Wedelia fruticosa
                                                   [Stemmodontia calycina]
                                             Wedelia lanceolata
                                             Wedelia reticulata
                                             Wedelia texana
                                                   [Wedelia hispida]
                                                   [Zexmenia hispida]
                                     Wilkesia
                                             Wilkesia gymnoxiphium
                                             Wilkesia hobdyi
                                     Wollastonia
                                             Wollastonia biflora
                                                   [Lipochaeta ovata]
                                             Wollastonia bryanii
                                                   [Lipochaeta bryanii]
                                             Wollastonia fauriei
                                                   [Lipochaeta deltoidea]
                                                   [Lipochaeta fauriei]
                                             Wollastonia integrifolia
                                                   [Lipochaeta integrifolia var. argentea]
                                                   [Lipochaeta integrifolia var. gracilis]
                                                   [Lipochaeta integrifolia var. major]
                                                   [Lipochaeta integrifolia var. megacephala]
                                                   [Lipochaeta integrifolia]
                                                   [Lipochaeta porophila]
                                             Wollastonia kamolensis
                                                   [Lipochaeta kamolensis]
                                             Wollastonia lavarum
                                                   [Lipochaeta lavarum var. conferta]
                                                   [Lipochaeta lavarum var. hillebrandiana]
                                                   [Lipochaeta lavarum var. lanaiensis]
                                                   [Lipochaeta lavarum var. longifolia]
                                                   [Lipochaeta lavarum var. maneleana]
                                                   [Lipochaeta lavarum var. ovata]
                                                   [Lipochaeta lavarum var. salicifolia]
                                                   [Lipochaeta lavarum var. scaposa]
                                                   [Lipochaeta lavarum var. skottsbergii]
                                                   [Lipochaeta lavarum var. stearnsii]
                                                   [Lipochaeta lavarum]
                                                   [Lipochaeta molokiniensis]
                                             Wollastonia micrantha
                                               Wollastonia micrantha subsp. exigua
                                                     [Lipochaeta exigua]
                                                     [Lipochaeta micrantha var. exigua]
                                               Wollastonia micrantha subsp. micrantha
                                                     [Lipochaeta micrantha var. micrantha]
                                                     [Lipochaeta micrantha]
                                             Wollastonia perdita
                                                   [Lipochaeta kawaihoaensis]
                                                   [Lipochaeta perdita]
                                             Wollastonia populifolia
                                                   [Lipochaeta populifolia]
                                                   [Lipochaeta subcordata var. populifolia]
                                             Wollastonia remyi
                                                   [Lipochaeta remyi]
                                             Wollastonia subcordata
                                                   [Lipochaeta flexuosa]
                                                   [Lipochaeta intermedia]
                                                   [Lipochaeta subcordata]
                                             Wollastonia tenuifolia
                                                   [Lipochaeta tenuifolia]
                                             Wollastonia tenuis
                                                   [Lipochaeta dubia]
                                                   [Lipochaeta minuscula]
                                                   [Lipochaeta tenuis var. sellingii]
                                                   [Lipochaeta tenuis]
                                             Wollastonia venosa
                                                   [Lipochaeta pinnatifida]
                                                   [Lipochaeta setosa]
                                                   [Lipochaeta venosa]
                                             Wollastonia waimeaensis
                                                   [Lipochaeta waimeaensis]
                                     Wyethia
                                             Wyethia amplexicaulis
                                                   [Espeletia amplexicaulis]
                                             Wyethia angustifolia
                                                   [Wyethia angustifolia var. foliosa]
                                             Wyethia arizonica
                                             Wyethia cusickii
                                             Wyethia glabra
                                             Wyethia helenioides
                                             Wyethia helianthoides
                                             Wyethia longicaulis
                                             Wyethia magna
                                             Wyethia mollis
                                     Xanthisma
                                             Xanthisma blephariphyllum
                                                   [Haplopappus blephariphyllus]
                                                   [Machaeranthera blephariphylla]
                                                   [Machaeranthera correllii]
                                             Xanthisma coloradoense
                                                   [Aster coloradoensis]
                                                   [Haplopappus coloradoensis]
                                                   [Machaeranthera coloradoensis var. coloradoensis]
                                                   [Machaeranthera coloradoensis]
                                                   [Xylorhiza coloradoensis]
                                             Xanthisma gracile
                                                   [Dieteria gracilis]
                                                   [Haplopappus gracilis]
                                                   [Haplopappus ravenii]
                                                   [Machaeranthera gracilis]
                                                   [Sideranthus gracilis]
                                             Xanthisma grindelioides
                                                   [Eriocarpum grindelioides]
                                                   [Haplopappus nuttallii]
                                                   [Machaeranthera grindelioides var. grindelioides]
                                                   [Machaeranthera grindelioides]
                                                   [Sideranthus grindelioides]
                                               Xanthisma grindelioides var. depressum
                                                     [Machaeranthera grindelioides var. depressa]
                                             Xanthisma gymnocephalum
                                                   [Haplopappus gymnocephalus]
                                                   [Machaeranthera gymnocephala]
                                             Xanthisma gypsophilum
                                                   [Machaeranthera gypsophila]
                                             Xanthisma junceum
                                                   [Haplopappus junceus]
                                                   [Machaeranthera juncea]
                                             Xanthisma paradoxum
                                                   [Machaeranthera pinnatifida var. paradoxa]
                                             Xanthisma spinulosum
                                                   [Amellus spinulosus]
                                                   [Dieteria spinulosa]
                                                   [Diplopappus pinnatifidus]
                                                   [Eriocarpum australe]
                                                   [Eriocarpum spinulosum]
                                                   [Haplopappus spinulosus subsp. australis]
                                                   [Haplopappus spinulosus subsp. laevis]
                                                   [Haplopappus spinulosus var. canescens]
                                                   [Haplopappus spinulosus var. turbinellus]
                                                   [Machaeranthera australis]
                                                   [Machaeranthera laevis]
                                                   [Machaeranthera pinnata]
                                                   [Machaeranthera pinnatifida subsp. pinnatifida]
                                                   [Machaeranthera pinnatifida var. pinnatifida]
                                                   [Machaeranthera pinnatifida/tanacetifolia]
                                                   [Machaeranthera pinnatifida]
                                                   [Sideranthus australis]
                                                   [Sideranthus cotula]
                                                   [Sideranthus laevis]
                                                   [Sideranthus puberulus]
                                                   [Sideranthus spinulosus]
                                                   [Sideranthus turbinellus]
                                                   [Sideranthus wootonii]
                                                   [Starkea pinnata]
                                               Xanthisma spinulosum var. austrotexanum
                                                     [Haplopappus texensis]
                                                     [Machaeranthera texensis]
                                               Xanthisma spinulosum var. chihuahuanum
                                                     [Haplopappus spinulosus var. chihuahuanus]
                                                     [Machaeranthera pinnatifida var. chihuahuana]
                                               Xanthisma spinulosum var. glaberrimum
                                                     [Haplopappus spinulosus subsp. glaberrimus]
                                                     [Machaeranthera pinnatifida var. glaberrima]
                                                     [Sideranthus glaberrimus]
                                                     [Sideranthus spinulosus var. glaberrimus]
                                               Xanthisma spinulosum var. gooddingii
                                                     [Haplopappus gooddingii]
                                                     [Haplopappus spinulosus subsp. gooddingii]
                                                     [Haplopappus spinulosus var. gooddingii]
                                                     [Machaeranthera pinnatifida subsp. gooddingii]
                                                     [Sideranthus gooddingii]
                                               Xanthisma spinulosum var. spinulosum
                                             Xanthisma texanum
                                               Xanthisma texanum subsp. texanum
                                               Xanthisma texanum var. drummondii
                                                     [Xanthisma texanum subsp. drummondii]
                                               Xanthisma texanum var. orientale
                                               Xanthisma texanum var. texanum
                                             Xanthisma viscidum
                                                   [Machaeranthera viscida]
                                     Xanthium
                                             Xanthium macrocarpum
                                             Xanthium orientale
                                               Xanthium orientale subsp. californicum
                                                     [Xanthium californicum var. rotundifolium]
                                                     [Xanthium californicum]
                                               Xanthium orientale subsp. italicum
                                                     [Xanthium cavanillesii]
                                                     [Xanthium italicum]
                                                     [Xanthium saccharatum]
                                                     [Xanthium strumarium subsp. italicum]
                                             Xanthium spinosum
                                                   [Acanthoxanthium spinosum]
                                                   [Xanthium spinosum var. inerme]
                                               Xanthium spinosum subsp. spinosum
                                                     [Acanthoxanthium spinosum]
                                                     [Xanthium canadense]
                                                     [Xanthium spinosum var. inerme]
                                               Xanthium spinosum var. ambrosioides
                                             Xanthium strumarium
                                               Xanthium strumarium var. canadense
                                                     [Xanthium acerosum]
                                                     [Xanthium californicum var. rotundifolium]
                                                     [Xanthium californicum]
                                                     [Xanthium campestre]
                                                     [Xanthium canadense]
                                                     [Xanthium cavanillesii]
                                                     [Xanthium cenchroides]
                                                     [Xanthium commune]
                                                     [Xanthium echinatum]
                                                     [Xanthium glanduliferum]
                                                     [Xanthium italicum]
                                                     [Xanthium macounii]
                                                     [Xanthium oligacanthum]
                                                     [Xanthium oviforme]
                                                     [Xanthium pensylvanicum]
                                                     [Xanthium saccharatum]
                                                     [Xanthium speciosum]
                                                     [Xanthium strumarium subsp. italicum]
                                                     [Xanthium strumarium var. oviforme]
                                                     [Xanthium strumarium var. pensylvanicum]
                                                     [Xanthium varians]
                                               Xanthium strumarium var. glabratum
                                                     [Xanthium americanum]
                                                     [Xanthium calvum]
                                                     [Xanthium chasei]
                                                     [Xanthium chinense]
                                                     [Xanthium curvescens]
                                                     [Xanthium cylindraceum]
                                                     [Xanthium echinellum]
                                                     [Xanthium globosum]
                                                     [Xanthium inflexum]
                                                     [Xanthium macrocarpum var. glabratum]
                                                     [Xanthium occidentale]
                                                     [Xanthium wootonii]
                                               Xanthium strumarium var. strumarium
                                               Xanthium strumarium var. wootonii
                                     Xanthocephalum
                                             Xanthocephalum gymnospermoides
                                                   [Grindelia gymnospermoides]
                                                   [Gutierrezia gymnospermoides]
                                               Xanthocephalum gymnospermoides subsp. gymnospermoides
                                                     [Grindelia gymnospermoides]
                                                     [Gutierrezia gymnospermoides]
                                     Xeranthemum
                                     Xerochrysum
                                             Xerochrysum bracteatum
                                                   [Bracteantha bracteata]
                                                   [Helichrysum bracteatum]
                                                   [Xeranthemum bracteatum]
                                     Xylorhiza
                                             Xylorhiza cognata
                                                   [Aster cognatus]
                                                   [Aster standleyi]
                                                   [Machaeranthera cognata]
                                                   [Xylorhiza standleyi]
                                             Xylorhiza confertifolia
                                                   [Machaeranthera confertifolia]
                                                   [Machaeranthera glabriuscula var. confertifolia]
                                             Xylorhiza cronquistii
                                                   [Machaeranthera cronquistii]
                                             Xylorhiza glabriuscula
                                                   [Aster glabriuscula var. parryi]
                                                   [Aster glabriuscula]
                                                   [Aster parryi]
                                                   [Aster xylorhiza]
                                                   [Machaeranthera glabriuscula var. villosa]
                                                   [Machaeranthera glabriuscula]
                                                   [Xylorhiza glabriuscula var. villosa]
                                                   [Xylorhiza villosa]
                                               Xylorhiza glabriuscula var. glabriuscula
                                                     [Aster glabriuscula var. parryi]
                                                     [Aster glabriuscula]
                                                     [Aster parryi]
                                                     [Aster xylorhiza]
                                                     [Machaeranthera glabriuscula]
                                             Xylorhiza linearifolia
                                                   [Machaeranthera linearifolia]
                                                   [Xylorhiza glabriuscula var. linearifolia]
                                             Xylorhiza orcuttii
                                                   [Aster orcuttii]
                                                   [Machaeranthera orcuttii]
                                             Xylorhiza tortifolia
                                                   [Aster abatus]
                                                   [Machaeranthera tortifolia]
                                                   [Xylorhiza lanceolata]
                                                   [Xylorhiza scopulorum]
                                               Xylorhiza tortifolia var. imberbis
                                                     [Machaeranthera tortifolia var. imberbis]
                                               Xylorhiza tortifolia var. parashantensis
                                               Xylorhiza tortifolia var. tortifolia
                                                     [Aplopappus tortifolius]
                                                     [Aster abatus]
                                                     [Aster goodingii]
                                                     [Aster mohavensis]
                                                     [Aster tortifolius]
                                                     [Machaeranthera tortifolia]
                                                     [Xylorhiza lanceolata]
                                                     [Xylorhiza scopulorum]
                                             Xylorhiza venusta
                                                   [Aster venustus]
                                                   [Machaeranthera venusta]
                                             Xylorhiza wrightii
                                                   [Aster wrightii]
                                                   [Machaeranthera wrightii]
                                                   [Townsendia wrightii]
                                     Xylothamia
                                     Yermo
                                             Yermo xanthocephalus
                                     Youngia
                                             Youngia japonica
                                                   [Crepis japonica]
                                               Youngia japonica subsp. elstonii
                                                     [Crepis japonica var. elstonii]
                                                     [Youngia pseudosenecio]
                                               Youngia japonica subsp. japonica
                                                     [Crepis japonica]
                                                     [Youngia thunbergiana]
                                     Zaluzania
                                             Zaluzania grayana
                                                   [Viguiera triloba]
                                     Zexmenia
                                     Zinnia
                                             Zinnia acerosa
                                                   [Zinnia pumila]
                                             Zinnia angustifolia
                                             Zinnia anomala
                                             Zinnia elegans
                                                   [Crassina elegans]
                                                   [Zinnia violacea]
                                             Zinnia grandiflora
                                                   [Crassina grandiflora]
                                             Zinnia maritima
                                               Zinnia maritima var. palmeri
                                                     [Zinnia palmeri]
                                             Zinnia peruviana
                                                   [Crassina multiflora]
                                                   [Zinnia multiflora]
                                                   [Zinnia pauciflora]

Problematic Rooting (14698)
                                               Vesicarpa potentilloides var. nitrophilum
                                                     [Sphaeromeria potentilloides var. nitrophila]
                                                     [Tanacetum potentilloides var. nitrophilum]

Problematic Rooting (35609)
                                               Machaeranthera coloradoensis var. brandegeei

Problematic Rooting (35739)
                                               Machaeranthera pinnatifida var. gooddingii
                                                     [Haplopappus gooddingii]
                                                     [Haplopappus spinulosus var. gooddingii]
                                                     [Sideranthus gooddingii]

Problematic Rooting (41359)
                                               Oligoneuron rigidum var. glabratum
                                                     [Oligoneuron jacksonii]
                                                     [Solidago corymbosa]
                                                     [Solidago jacksonii]
                                                     [Solidago rigida var. glabrata]
                                                     [Solidago rigida var. laevicaulis]

Problematic Rooting (45427)
                                               Liatris densispicata var. interrupta
                                                     [Liatris angustifolia]

Problematic Rooting (50046)
                                               Aster cordifolius subsp. laevigatus

Problematic Rooting (53536)
                                               Haplopappus racemosus var. sessiliflorus

Problematic Rooting (54550)
                                               Hieracium flagellare var. cernuiforme
                                                     [Hieracium duplex]
                                                     [Hieracium flagellare subsp. cernuiforme]
                                                     [Hieracium macrostolonum]
                                               Hieracium flagellare var. flagellare

Problematic Rooting (54645)
                                               Hieracium praealtum var. decipiens

Problematic Rooting (60801)
                                               Stephanomeria minor var. myrioclada
                                                     [Stephanomeria myrioclada]
                                                     [Stephanomeria tenuifolia var. myrioclada]
                                               Stephanomeria minor var. uintaensis
                                                     [Lygodesmia tenuifolia]
                                                     [Stephanomeria minor var. uintensis]
                                                     [Stephanomeria tenuifolia var. uintaensis]
                                                     [Stephanomeria tenuifolia var. uintensis]

Problematic Rooting (65785)
                                               Aster laevis var. guadalupensis

Problematic Rooting (65792)
                                               Aster lanceolatus subsp. simplex
                                               Aster lanceolatus var. interior

Problematic Rooting (68768)
                                               Chrysothamnus nauseosus var. abbreviatus
                                               Chrysothamnus nauseosus var. glareosus