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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
Daughter corms generally sessile. Leaf: 2–5, generally keeled, entire, glabrous, occasionally withered by flowering. Inflorescence: raceme- or umbel-like, generally dense; scape generally curved, twisted, or twining, cylindric; bracts ± papery; pedicels generally < flowers. Flower: perianth tube cylindric to bell-shaped, appendages at junction of tube, lobes forming crown; staminodes 0 (3, stamen-like); stamens 3, equal, or 6, unequal, 3 smaller, filaments fused to perianth tube, forming crown-like tube outside anthers, anthers attached at base; style 1, stigma weakly 3-lobed. Fruit: generally sessile, generally ovoid, 3-angled. Seed: sharp-angled, black-crusted.Key to Dichelostemma
5 species: western United States, especially northern California, northern Mexico. (Greek: toothed crown, from perianth appendages) [Keator 1992 Four Seasons 9:24–39]
Leaf: 3–4, 30–70 cm, keeled. Inflorescence: umbel-like, dense; scape 40–150 cm, twining, scabrous; bracts 12–15 mm, wide-ovate, acute, ± pink; pedicels 10–40 mm; flowers 6–30, occasionally horizontal in flower, erect in fruit. Flower: perianth pink (white), tube 5–7 mm, ± spheric, narrowed above ovary, angles 6, sac-like, lobes ± spreading (ascending in fruit), 5–7 mm, crown folding inward toward, hiding anthers, 3–4 mm, narrow-lanceolate, white; staminodes 3, alternate stamens, ± 3 mm, linear-oblong, stamen-like, cream-white, ciliate-dentate, tip generally notched; stamens 3, anthers 3–4 mm; ovary 4–5 mm, ± spheric, stalk 0 or short, style 3–4 mm.
n=9,18. Foothill woodland, chaparral scrub; 100–1600 m. Inner North Coast Ranges, Cascade Range Foothills, Sierra Nevada Foothills. May–Jun [Online Interchange]
Previous taxon: Dichelostemma multiflorum
Next taxon: Muilla
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 24 2014
Citation for this treatment: [Author of taxon treatment] 2012. Dichelostemma, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=22855, accessed on Apr 24 2014
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