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BRASSICACEAE (Cruciferae) MUSTARD FAMILY

Ihsan A. Al-Shehbaz, except as noted

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

STREPTANTHUS JEWELFLOWER
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.
35 species: southwestern United States, northern Mexico. (Greek: twisted flower, from wavy-margined petals)

Key to Streptanthus

S. cordatus Nutt.
NATIVE
Perennial herb, caudex simple or branched, glaucous, generally glabrous. Stem: (1)3–9(11) dm, simple or few-branched. Leaf: basal rosetted, spoon-shaped to narrowly oblanceolate; petiole ciliate, broadly winged; mid-cauline sessile, 2–9 cm, 0.7–4.5(6) cm wide, broadly oblong to ovate or ± round to lanceolate, entire or few-toothed, base lobed to clasping; distal reduced. Inflorescence: open; terminal sterile flower cluster 0. Flower: calyx bell-shaped, sepals 5–12 mm, broadly oblong, not keeled, ± green-brown to purple, tips hairy or not; petals 9–15 mm, 0.7–1 mm wide, not crinkled, purple to ± brown; filaments free, in 3 pairs of unequal length, longest pair 7.5–10 mm; anthers all fertile, 2.5–5 mm. Fruit: ascending to ± spreading, 5–10.5(14.5) cm, (2.5)3–6(7) mm wide, straight, not constricted between seeds; valves glabrous, midvein distinct; stigma ± unlobed to 2-lobed; pedicels spreading-ascending, 3–11(14) mm. Seed: 20–38(46), 2.5–5 mm, broadly oblong to ± round; wing 0.1–0.9 mm wide, continuous. [Online Interchange]

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Apr 23 2014
Citation for this treatment: [Author of taxon treatment] 2012. Streptanthus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=45731, accessed on Apr 23 2014

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Bioregions in which Streptanthus cordatus occurs 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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CCH collections by month

Duplicates counted once; synonyms included.
Species do not include records of infraspecific taxa.
Blue line denotes eFlora flowering time.