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Organism
  Plantae
      Tracheophyta
            Magnoliopsida
                    Piperales
                            Aristolochiaceae
                                     Aristolochia
                                             Aristolochia arborea
                                             Aristolochia bilabiata
                                                   [Aristolochia chasmema]
                                             Aristolochia brevipes
                                             Aristolochia californica
                                                   [Isotrema californica]
                                             Aristolochia clematitis
                                             Aristolochia coryi
                                                   [Aristolochia brevipes var. acuminata]
                                             Aristolochia elegans
                                                   [Aristolochia littoralis]
                                             Aristolochia erecta
                                                   [Aristolochia longiflora]
                                             Aristolochia grandiflora
                                             Aristolochia labiata
                                             Aristolochia macrophylla
                                                   [Aristolochia durior]
                                                   [Isotrema macrophyllum]
                                             Aristolochia maxima
                                             Aristolochia oblongata
                                             Aristolochia pentandra
                                                   [Aristolochia marshii]
                                             Aristolochia reticulata
                                             Aristolochia ringens
                                             Aristolochia serpentaria
                                                   [Aristolochia convolvulacea]
                                                   [Aristolochia hastata]
                                                   [Aristolochia nashii]
                                                   [Aristolochia serpentaria var. hastata]
                                                   [Aristolochia serpentaria var. nashii]
                                                   [Endodeca serpentaria var. hastata]
                                                   [Endodeca serpentaria]
                                             Aristolochia tomentosa
                                                   [Isotrema tomentosa]
                                                   [Isotrema tomentosum]
                                             Aristolochia trilobata
                                             Aristolochia watsonii
                                                   [Aristolochia porphyrophylla]
                                             Aristolochia wrightii
                                             Aristolochia zollingeriana
                                                   [Aristolochia hastata]
                                     Asarum
                                             Asarum blumei
                                                   [Asarum virginicum]
                                             Asarum canadense
                                                   [Asarum acuminatum]
                                                   [Asarum canadense var. acuminatum]
                                                   [Asarum canadense var. ambiguum]
                                                   [Asarum canadense var. reflexum]
                                                   [Asarum reflexum]
                                                   [Asarum rubrocinctum]
                                             Asarum caudatum
                                               Asarum caudatum var. caudatum
                                             Asarum hartwegii
                                             Asarum lemmonii
                                             Asarum marmoratum
                                             Asarum wagneri
                                                   [Asarum caudatum var. viridiflorum]
                                     Hexastylis
                                             Hexastylis arifolia
                                                   [Asarum arifolium]
                                               Hexastylis arifolia var. arifolia
                                                     [Asarum arifolium]
                                               Hexastylis arifolia var. callifolia
                                                     [Asarum arifolium var. callifolia]
                                                     [Asarum callifolium]
                                               Hexastylis arifolia var. ruthii
                                                     [Asarum arifolium var. ruthii]
                                                     [Asarum ruthii]
                                                     [Hexastylis ruthii]
                                             Hexastylis contracta
                                                   [Asarum contractum]
                                             Hexastylis harperi
                                                   [Hexastylis shuttleworthii var. harperi]
                                             Hexastylis heterophylla
                                                   [Asarum heterophyllum]
                                             Hexastylis lewisii
                                                   [Asarum lewisii]
                                             Hexastylis minor
                                                   [Asarum minus]
                                             Hexastylis naniflora
                                             Hexastylis rhombiformis
                                             Hexastylis shuttleworthii
                                                   [Asarum shuttleworthii]
                                               Hexastylis shuttleworthii var. shuttleworthii
                                                     [Asarum shuttleworthii]
                                             Hexastylis sorriei
                                             Hexastylis speciosa
                                                   [Asarum speciosum]
                                             Hexastylis virginica
                                                   [Asarum memmingeri]
                                                   [Asarum virginicum]
                                                   [Hexastylis memmingeri]
                                     Heyderia