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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

SIBAROPSIS

1 sp.: California. (Greek: like Sibara) [Boyd & Ross 1997 Madroño 44:29–47]

S. hammittii S. Boyd & T.S. Ross HAMMITT'S CLAY-CRESS
NATIVE
Annual, glabrous or sparsely simple-hairy, glaucous. Stem: 0.5–2 dm, erect, simple or branched near base. Leaf: cauline (1)1.5–3(4.5) cm, 0.5–1 mm wide, linear, entire, sessile, base not lobed. Inflorescence: elongated. Flower: sepals erect, 2.8–3.2 mm, base only ± sac-like; petals 8.5–10 mm, 2–2.5 mm wide, spoon-shaped, unequal, purple to pink, darker-veined, claw 5–6 mm; filaments in 3 pairs of unequal length, longest pair fused. Fruit: silique, dehiscent, (1.5)2–2.5 cm, 0.7–0.9 mm wide, linear, flat parallel to septum, unsegmented; pedicels ascending, 2.5–4 mm; style (1.5)3–4.5 mm, stigma entire. Seed: 24–44, in 1 row, 1–1.3 mm, oblong, obscurely winged distally.
2n=28. Washes, steep hillsides, dry flats, scree, calcareous rubble, rocky bluffs, exposed crevices; 600–1300 m. Peninsular Ranges (Santa Ana Mtns, Riverside Co.; Viejas Mtn, Poser Mtn, San Diego Co.). Mar–Apr [Online Interchange] {CNPS list}

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Citation for the whole project: Jepson Flora Project (eds.) 2013. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on Jul 26 2014
Citation for this treatment: [Author of taxon treatment] 2013. Sibaropsis, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=77420, accessed on Jul 26 2014

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Bioregions in which Sibaropsis hammittii 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.