Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

BRASSICACEAE

MUSTARD FAMILY

Reed C. Rollins, except as specified

Annual to subshrub
Leaves generally basal and cauline, alternate, generally simple; stipules 0
Inflorescence: generally raceme
Flower bisexual; sepals 4, free; petals (0)4, free, generally white or yellow, often clawed; stamens generally (2,4)6, generally 4 long, 2 short; ovary 1, superior, chambers generally 2, septum membranous, connecting 2 parietal placentas, style 1, stigma simple or 2-lobed
Fruit: generally capsule ("silique") with 2 deciduous valves, sometimes breaking transversely or indehiscent
Seeds 1–many per chamber
Genera in family: 300+ genera, 3000+ species: worldwide, especially cool regions; some cultivated for food (especially Brassica, Raphanus ) and ornamental
Recent taxonomic note: Recently treated to include Capparaceae [Rodman et al. 1993 Ann Missouri Bot Gard 80:686–699; Rollins 1993 Cruciferae of Continental North America. Stanford Univ Press]
Family description, key to genera by Robert A. Price.

DRABA

Robert A. Price

Annual to perennial herb, often cushion- or mat-forming; hairs often branched
Leaves basal and sometimes cauline, entire or shallowly toothed
Flower: sepal bases equal; petals < 10 mm, yellow or white, claw and limb generally distinct
Fruit < 30 mm, generally lanceolate to ovate, generally flat parallel to septum, less often partially inflated, sometimes twisted or wavy
Seeds: 2 rows per chamber; wing generally 0
Species in genus: 350+ species: n hemisphere, mtns of South America
Etymology: (Greek: acrid)
Reference: [Rollins & Price 1988 Aliso 12:17–27]

Native

D. sierrae Sharsm.

SIERRA DRABA

Perennial
Stems cushion-forming, < 6 cm; hairs dense, bush-like
Leaves basal, 2–7 mm, linear-oblanceolate, entire, grayish; surface hairs ± bush-like or stellate with branches branched; margin hairs 0 or not very prominent
Inflorescence < 10-flowered
Flower: petals ± 4–5 mm, yellow
Fruit 3–8 mm, ± ovate, strongly compressed, generally twisted; hairs small, forked and stellate; style 0.2–0.9 mm
Seeds < 10, 1–1.2 mm; wings 0
Ecology: UNCOMMON. Rock crevices
Elevation: > 3500 m.
Bioregional distribution: c High Sierra Nevada (Fresno, Inyo cos.).
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for DRABA%20sierrae being generated
 


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