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Key to families | Table of families and genera

Specimen numbers are hyperlinked to records in the Consortium of California Herbaria data view where possible. Taxa are hyperlinked to entries in the Jepson Interchange via the "[Online Interchange]" link.

 

THEMIDACEAE BRODIAEA FAMILY

J. Chris Pires, except as noted


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[10], 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

1. Perianth parts ± free at base, not forming obvious tube

2. Filaments basally dilated, fused to form nectar cup, distally thread-like ..... BLOOMERIA

2' Filaments thread-like to dilated, occasionally overlapped or fused but not forming cup ..... MUILLA

1' Perianth parts fused at base, forming obvious tube

3. Stamens 3, equal (or 6, 3 smaller in Dichelostemma capitatum)

4. Scape generally straight; staminodes (0)3, alternate 3 stamens; filaments generally not forming crown-like tube ..... BRODIAEA

4' Scape generally curved, twisted, or twining; staminodes 0 (3, stamen-like in Dichelostemma volubile); filaments forming crown-like tube outside anthers ..... DICHELOSTEMMA

3' Stamens 6, equal or not

5. Filaments fused into tube with appendages forming crown ..... ANDROSTEPHIUM

5' Filaments free, appendages forming crown or generally 0 ..... TRITELEIA

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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