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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]
Perennial herb, tufted, scapose, cushion-forming. Stem: unbranched, (1)2–6(10) cm, glabrous or hairs sessile, stellate. Leaf: (2)4–11(15) mm, linear to linear-oblanceolate, entire, midvein prominent, hairs sessile, comb-like, 7–16-rayed, long axis parallel to midvein and branches shorter toward hair tips, adaxial occasionally glabrous; cauline leaves 0. Inflorescence: 4–12(17)-flowered; axis glabrous or as hairy as stem; pedicels (2)3–10(13) mm. Flower: sepals 1.5–3 mm; petals 2.5–4 mm, 1.5–3 mm wide, yellow. Fruit: 3–6(7) mm, ovoid to lanceolate, inflated at least near base, not twisted, puberulent with simple and sessile, generally unequally 2-rayed hairs; style 0.1–0.8(1) mm. Seed: 6–12, 1.3–1.8 mm, ovoid.
2n=32,64. Common. Alpine barrens, dry slopes, tundra; 2000–3900 m. High Sierra Nevada, n East of Sierra Nevada, White and Inyo Mountains; western Canada, western United States. Generally produces seeds asexually. May–Aug [Online Interchange]
Previous taxon: Draba novolympica
Next taxon: Draba praealta
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on May 25 2015
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=23389, accessed on May 25 2015
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|Geographic subdivisions indicated for the distribution of Draba oligosperma|| Markers link to CCH specimen records. If the markers are obscured, reload the page [or change window size and reload]. Yellow markers indicate records that may provide evidence for eFlora range revision or may have georeferencing or identification issues.
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(Note: any qualifiers in the taxon distribution description, such as 'northern', 'southern', 'adjacent' etc., are not reflected in the map above, and in some cases indication of a taxon in a subdivision is based on a single collection or author-verified occurence).
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