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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 ± glaucous; hairs simple or 0. Leaf: basal rosetted or not, petioled, entire or dentate to pinnately lobed or divided; cauline sessile, occasionally petioled, base generally lobed or clasping. Inflorescence: elongated. Flower: radial or bilateral; calyx urn- or occasionally bell-shaped, sepals erect, base ± sac-like, keeled or not; petal blade narrower to wider than proximal 1/2, generally channeled, margins ± crinkled or not; stamens in 3 pairs of unequal length, or 4 long and 2 short, longest filaments fused or free. Fruit: silique, dehiscent, linear, flat parallel to septum, unsegmented; stigma entire or 2-lobed. Seed: 10–120, in 1 row, generally winged.Key to Streptanthus
35 species: southwestern United States, northern Mexico. (Greek: twisted flower, from wavy-margined petals)
Annual, glabrous throughout. Stem: erect, (1)2–9(10.5) dm, branched distally. Leaf: basal not rosetted, pinnately divided; mid-cauline petioled, 2–12 cm, pinnately divided into thread-like segments 0.4–2.7 cm, 0.5–1.5 mm wide, leaf base not lobed; distal cauline sessile, clasping, lance-linear to ovate or cordate, entire. Inflorescence: open; terminal sterile flower cluster 0; bracted below or between most proximal 1–2 flowers. Flower: calyx urn-shaped, sepals 5–7 mm, keeled, yellow or ± purple; petals 8–16 mm, 1.5–3.5 mm wide, recurved, crinkled, pale yellow to ± white, veins purple; filaments free, in 3 pairs of unequal length, longest pair 4–8 mm; fertile anthers 3.5–4 mm. Fruit: abruptly reflexed at stalk above receptacle, 3–9 cm, 1–1.5(2.2) mm wide, straight, not constricted between seeds; valves glabrous, midvein obscure; stigma ± 2-lobed; pedicels spreading, 2–10 mm, straight. Seed: (22)38–80, 1–1.5(2.2) mm, oblong; wing 0–0.1(0.4) mm wide at seed tip.
2n=28. Open woodland, rocky slopes; 200–1900 m. n Sierra Nevada Foothills, c&s Sierra Nevada. Apr–Jul [Online Interchange]
Previous taxon: Streptanthus cordatus var. piutensis
Next taxon: Streptanthus drepanoides
Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Sep 21 2014
Citation for this treatment: [Author of taxon treatment] 2013. Streptanthus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=45733, accessed on Sep 21 2014
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|Geographic subdivisions indicated for the distribution of Streptanthus diversifolius|| 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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