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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Perennial herb from corm, outer coat fibrous [membranous]. Leaf: basal, 1–10, linear to narrow-lanceolate. Inflorescence: scapose, generally umbel-like; scape erect, generally 1(2), cylindric, generally rigid, occasionally wavy to twining; flower bracts 2–4, not enclosing flower buds. Flower: perianth parts 6 in 2 petal-like whorls, free or ± fused below into tube; staminodes 0 or 3; stamens 3 or 6, free or fused to perianth, occasionally appendaged; ovary superior, chambers 3, ovules 2–several per chamber. Fruit: capsule, loculicidal.
10–11 genera, 60–70 species: western North America. [Pires & Sytsma 2002 Amer J Bot 89:1342–1359] —Scientific Editors: Dale W. McNeal, Thomas J. Rosatti.
Key to Themidaceae
Corm spheric. Leaf: basal, linear, channeled. Inflorescence: scape straight; bracts 3, lanceolate; pedicels not jointed, erect. Flower: perianth parts 6 in 2 petal-like whorls, tube funnel-shaped, lobes narrow-oblong; stamens 6, filaments fused into nectar tube with erect toothed appendages forming crown between anthers, anthers attached near base; style persistent, stigma small, 3-lobed. Fruit: ± spheric, obtuse-3-angled. Seed: several per chamber, flat, black-crusted.
3 species: western United States, northern Mexico. (Greek: stamen crown, for appendages of fused filaments)
Previous taxon: Themidaceae
Next taxon: Androstephium breviflorum
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 5 2015
Citation for this treatment: [Author of taxon treatment] 2013. Androstephium, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=9893, accessed on Mar 5 2015
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