Loasaceae
Loasaceae image
Debra Valov  
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JANAS 30(2)
PLANTS: annual or perennial herbs, shrubs, one species a small tree; hairs diverse, often barbed, sometimes dendritic or stinging, usually unicellular and silicified or calcified. STEMS: mostly erect, usually brittle; mature epidermis often white. LEAVES: exstipulate, ours alternate, simple and usually toothed or lobed. I INFLORESCENCE: cymose or sometimes racemose. FLOWERS: perfect, actinomorphic, epigynous or rarely perigynous, the hypanthium often extending slightly beyond the ovary as a short tube; sepals 5 (in ours), usually persistent; petals 5 (in ours), sometimes appearing more numerous by development ofpetaloid staminodia, free or connate; stamens (2), 5 or lO-many, free to epipetalous; pistil (in ours) 3- or 5-carpellate, unilocular; style 1, often persistent. FRUIT: a capsule or an achene. SEEDS: 1 and subapical or l-many and parietal; endosperm present or absent. NOTES: 15 genera, ca. 250 species, New World, except 1 genus in Afr. and Arabia, 1 in Marquesas Islands. Hufford, L. D. 1989. Nordic J. Bot. 9:217-227, and references therein. REFERENCES: Christy, Charlotte M. 1998. Loasaceae. J. Ariz. - Nev. Acad. Sci. 30(2): 96.
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Species within checklist: Arizona
Cevallia sinuata
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Eucnide rupestris
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Eucnide urens
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Mentzelia affinis
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Mentzelia albicaulis
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Mentzelia aspera
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Mentzelia asperula
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Mentzelia collomiae
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Mentzelia cronquistii
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Mentzelia desertorum
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Mentzelia integra
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Mentzelia involucrata
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Mentzelia isolata
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Mentzelia jonesii
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Mentzelia lindheimeri
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Mentzelia lindleyi
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Mentzelia longiloba
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Mentzelia montana
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Mentzelia multiflora
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Mentzelia nuda
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Mentzelia obscura
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Mentzelia oligosperma
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Mentzelia oreophila
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Mentzelia polita
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Mentzelia pterosperma
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Mentzelia rusbyi
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Mentzelia tricuspis
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Mentzelia veatchiana
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Petalonyx linearis
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Petalonyx nitidus
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Petalonyx parryi
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Petalonyx thurberi
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