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Mentzelia
Family: Loasaceae
Mentzelia image
Ries Lindley
  • VPAP
  • Gleason & Cronquist
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JANAS 30(2)
PLANTS: Annuals or perennials, ours herbaceous to suffrutescent; hairs often barbed, not stinging. LEAVES: sessile (including those with blades narrowing gradually to the base) or distinctly petiolate; blades linear, lanceolate to elliptic, ovate or oblanceolate; margins dentate to pinnately lobed, sometimes crenate or entire. PLANTS: Annuals or perennials, ours herbaceous to suffrutescent; hairs often barbed, not stinging. INFLORESCENCE: cymose. FLOWERS: subtended by O-several, leaf-like to linear bracts; calyx mostly persistent, the lobes lanceolate to subulate; petals distinct or basally coherent and adherent to filaments, deciduous, white to yellow or orange; stamens 10-ca. 300, shorter than the petals, free or basally coherent, those of outer whorls often with broad filaments and often forming petaloid staminodia; pistil (in ours) 3-carpellate, exceptionally more; stigmas 3 appressed lobes but appearing as 3 grooves, sometimes separating in age. CAPSULES: apically dehiscent by 3 valves. SEEDS: 10-many, rarely fewer, 1-4 mm long, parietal; testa diversely sculptured, smooth, reticulate or striate at low magnification; endosperm present. X = 14. NOTES: At least 100 spp.; New World. (for C. Mentzel). The sections are sufficiently distinctive that several have occasionally been treated as separate genera. Fruit measurements (and the term -body-) refer to the seed-containing portion, exclusive of the calyx lobes when these persist. Specimens that are depauperate or that lack mature fruits and seeds may be impossible to identify. REFERENCES: Christy, Charlotte M. 1998. Loasaceae. J. Ariz. - Nev. Acad. Sci. 30(2): 96.
Vascular plants of NE US and adjacent Canada
Hypanthium ovoid to cylindric or obconic; sep 5; pet 5-10; stamens 10-200, distinct or connate into fascicles; ovules 2-many on 3 parietal placentas; style 3-lobed; fr a capsule; annual or perennial herbs or shrubs, armed with stiff, barbed hairs, with alternate, serrate to pinnatifid lvs and 1-many often large, white to yellow or orange fls terminating the branches. (Nuttallia) 50, New World.

Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

©The New York Botanical Garden. All rights reserved. Used by permission.
Species within checklist: Moab NEON (MOAB) plants - Southern Rockies & Colorado Plateau (D13) || << 1 - 50 taxa >>
Mentzelia affinis
Image of Mentzelia affinis
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Mentzelia albescens
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Mentzelia albicaulis
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Mentzelia argillicola
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Mentzelia argillosa
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Mentzelia aspera
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Mentzelia asperula
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Mentzelia candelariae
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Mentzelia canyonensis
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Mentzelia chrysantha
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Mentzelia collomiae
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Mentzelia congesta
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Mentzelia conspicua
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Mentzelia crocea
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Mentzelia decapetala
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Mentzelia densa
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Mentzelia desertorum
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Mentzelia dispersa
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Mentzelia eremophila
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Mentzelia floridana
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Mentzelia flumensevera
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Mentzelia goodrichii
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Mentzelia gracilenta
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Mentzelia hirsutissima
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Mentzelia hispida
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Mentzelia hualapaiensis
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Mentzelia humilis
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Mentzelia incisa
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Mentzelia involucrata
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Mentzelia inyoensis
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Mentzelia isolata
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Mentzelia jonesii
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Mentzelia laciniata
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Mentzelia laevicaulis
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Mentzelia lagarosa
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Mentzelia leucophylla
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Mentzelia librina
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Mentzelia lindheimeri
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Mentzelia lindleyi
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Mentzelia linearifolia
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Mentzelia longiloba
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Mentzelia marginata
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Mentzelia memorabilis
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Mentzelia mexicana
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Mentzelia micrantha
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Mentzelia mollis
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Mentzelia monoensis
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Mentzelia montana
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Mentzelia multicaulis
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Mentzelia multiflora
Image of Mentzelia multiflora
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