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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 (shrub); hairs 0 or simple. Leaf: basal rosetted or not, petioled, entire, dentate, to 1–3-pinnately lobed; cauline short-petioled to sessile, base occasionally lobed to clasping. Inflorescence: elongated or congested. Flower: sepals erect or spreading, oblong to ovate, base not sac-like; petals linear to obovate, white or yellow (pink or purple), occasionally reduced or 0; stamens 2, 4, or 6. Fruit: silicle, generally dehiscent, oblong to ovate, obcordate, or round (spectacle-shaped), flat perpendicular to septum (inflated), unsegmented. Seed: 2(4), gelatinous when wet; wing narrow or 0.Key to Lepidium
220 species: all continents except Antarctica. (Greek: little scale, from fruit) [Al-Shehbaz et al. 2002 Novon 12:5–11]
Unabridged references: [Hitchcock 1936 Madroño 3:265–300]
Annual, biennial, puberulent or glabrous. Stem: erect, generally 1, (1)2.5–5(6.5) dm, branched distally. Leaf: (1.5)2.5–8(11) cm, oblanceolate, spoon-shaped, or oblong, serrate or pinnately lobed, early-deciduous; mid-cauline petioled, (0.7)1.3–6.2(8) cm, (0.5)1.5–10(18) mm wide, narrowly oblanceolate or linear, tapered at base, not lobed, entire or dentate. Inflorescence: much-elongated, rachis glabrous or puberulent, hairs club-shaped. Flower: sepals 0.5–0.8(1) mm; petals 0 or thread-like, 0.3–0.9 mm, white; stamens 2. Fruit: (2)2.5–3(3.5) mm, 1.5–2.5(3) mm wide, obovate, flat, tip winged, notch 0.2–0.4 mm; valves not veined, glabrous or puberulent; pedicel (1.5)2–3.5(4) mm, cylindric, spreading to ± ascending, puberulent adaxially. Seed: 1–1.3 mm, ovate.
Fields, pastures, meadows, disturbed sites, floodplains, chaparral; < 3500 m. Klamath Ranges, Cascade Range, n&c High Sierra Nevada, Great Central Valley, South Coast, Great Basin Floristic Province, Mojave Desert; North America; naturalized in Europe, Asia, South America. [Lepidium densiflorum var. elongatum (Rydb.) Thell.; Lepidium densiflorum var. macrocarpum G.A. Mulligan; Lepidium densiflorum var. pubicarpum (A. Nelson) Thell.; Lepidium densiflorum var. ramosum (A. Nelson) Thell.] Highly variable. May–Jul [Online Interchange]
Unabridged note: Divided into varieties based on continuous characters of dubious value that generally do not correspond with geog.
Previous taxon: Lepidium coronopus
Next taxon: Lepidium dictyotum
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Mar 8 2014
Citation for this treatment: [Author of taxon treatment] 2012. Lepidium, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=30526, accessed on Mar 8 2014
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