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Key to families | Table of families and genera
Indexes to all accepted names and synonyms:
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Annual to shrub; sap pungent, watery. Leaf: generally simple, alternate; generally both basal, cauline; stipules 0. Inflorescence: generally raceme, generally not bracted. Flower: bisexual, generally radial; sepals 4, generally free; petals (0)4, forming a cross, generally white or yellow to purple; stamens generally 6 (2 or 4), 4 long, 2 short (3 pairs of unequal length); ovary 1, superior, generally 2-chambered with septum connecting 2 parietal placentas; style 1, stigma entire or 2-lobed. Fruit: capsule, generally 2-valved, "silique" (length >= 3 × width) or "silicle" (length < 3 × width), dehiscent by 2 valves or indehiscent, cylindric or flat parallel or perpendicular to septum, segmented or not. Seed: 1–many, in 1 or 2 rows per chamber, winged or wingless; embryo strongly curved.
± 330 genera, 3780 species: worldwide, especially temperate. [Al-Shehbaz et al. 2006 Plant Syst Evol 259:89–120] Highest diversity in Mediterranean area, mountains of southwestern Asia, adjacent central Asia, western North America; some Brassica species are oil or vegetable crops; Arabidopsis thaliana used in experimental molecular biology; many species are ornamentals, weeds. Aurinia saxatilis (L.) Desvaux in cultivation only. Aubrieta occasional waif in central North Coast Ranges, Carrichtera annua (L.) DC. in South Coast, Iberis sempervirens L., Iberis umbellata L. in Peninsular Ranges, Teesdalia coronopifolia (Bergeret) Thell., Teesdalia nudicaulis (L.) W.T. Aiton in southern Outer North Coast Ranges, Central Coast. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; California taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.
Key to Brassicaceae
Annual to perennial herb, generally cushion- or mat-forming, occasionally scapose, hairs simple, forked, or many-branched. Leaf: basal generally rosetted; cauline entire or shallowly toothed, base generally not lobed, occasionally 0. Inflorescence: generally many-flowered, elongated or not; bracts generally 0. Flower: sepals bases equal; petals generally short-clawed, yellow or white (lavender or red). Fruit: silique or silicle, dehiscent, linear to lanceolate or ovate, occasionally ovoid or spheric, cylindric or flat parallel to septum, unsegmented; stigma entire. Seed: in 2 rows; wing generally 0.Key to Draba
370+ species: northern hemisphere, South America mountains. (Greek: acrid, describing taste of crucifer leaves) [Al-Shehbaz & Windham 2007 Harvard Pap Bot 12:409–419]
Unabridged references: [Beilstein & Windham 2003 Syst Bot 28:584–592; Hitchcock 1941 Univ Washington Publ Biol 11:1–132; Koch & Al-Shehbaz 2002 Ann Missouri Bot Gard 89:88–109; Rollins & Price 1988 Aliso 12:17–27; Schulz 1927 Pflanzenreich IV 105(Heft 89):1–396]
Annual, occasionally scapose. Stem: (2)3–27(37) cm, simple, hairs 2–4(5)-rayed, base with simple hairs. Leaf: basal not rosetted, (0.4)1–3.5(5) cm, oblanceolate to broadly obovate, dentate, hairs stalked, 2–4-rayed, occasionally mixed with simple; cauline leaves 0–6. Inflorescence: 10–50(70)-flowered, elongated to ± congested, not umbel-like; axis hairs 2–4-rayed; pedicels (1)2–7(10) mm, hairy. Flower: sepals 1.5–2.5 mm; petals (2)2.5–4.5(5) mm, 1–2 mm wide, white, or late-season flower petals 0. Fruit: (3)6–12(16) mm, 1.7–2.7(3) mm wide, oblong to linear or broadly ovate, flat, not twisted, hairs simple or 2–4-rayed (glabrous); style to 0.4 mm. Seed: (12)24–66(72), 0.5–0.7 mm, ovoid.
2n=16,32. Open or disturbed places; < 2100 m. s Sierra Nevada, San Joaquin Valley, Southwestern California, White and Inyo Mountains, Desert; western United States, northern Mexico. [Draba cuneifolia var. cuneifolia; Draba cuneifolia var. integrifolia S. Watson; Draba cuneifolia var. sonorae (Greene) Parish] Jan–May [Online Interchange]
Unabridged note: 3 ± distinct varieties, all occurring in southern California: Draba cuneifolia var. cuneifolia (eastern & southwestern United States, northern Mexico) has fruits with simple hairs; Draba cuneifolia var. integrifolia S. Watson (to Utah, Texas, northern Mexico) has fruits 7–12 mm, 20–44-seeded, with (2)4-rayed hairs; Draba cuneifolia var. sonorae (Greene) Parish (Arizona, northern Mexico) has fruits 3–6(8) mm, 12–24-seeded, with (2)4-rayed hairs. Expanded author citation: Draba cuneifolia Nutt. ex Torr. & A. Gray
Previous taxon: Draba cruciata
Next taxon: Draba densifolia
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 22 2014
Citation for this treatment: [Author of taxon treatment] 2013. Draba, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=23332, accessed on Jul 22 2014
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© 1997 Christopher L. Christie
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