Common Name: MUSTARD FAMILY Habit: 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. Genera In Family: +- 330 genera, 3780 species: worldwide, especially temperate. Note: 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 NCoR, Carrichtera annua (L.) DC. in SCo, Iberis sempervirens L., Iberis umbellata L. in PR, Teesdalia coronopifolia (Bergeret) Thell., Teesdalia nudicaulis (L.) W.T. Aiton in southern NCoRO, CCo. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; California taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella. eFlora Treatment Author: Ihsan A. Al-Shehbaz, except as noted Scientific Editor: Douglas H. Goldman, Bruce G. Baldwin.
Habit: Annual [perennial herb]; hairs 0 or simple. Leaf: basal not rosetted, petioled, dentate to 1- or 2-pinnately lobed; distal reduced, sessile or short-petioled, base not lobed. Inflorescence: elongated. Flower: sepals oblong to linear, spreading, base not sac-like; petals yellow, obovate, clawed. Fruit: silique, dehiscent, linear to lanceolate, cylindric, +- 4-angled, or flat parallel to septum, generally constricted between seeds, segmented; terminal segment 1- or 2-seeded or seeds 0; proximal segment few- to several-seeded, valves prominently 3--7-veined; stigma 2-lobed. Seed: 4--16(24), in 1 row, spheric, wingless. Etymology: (Latin: mustard, from flavor of seeds) eFlora Treatment Author: Ihsan A. Al-Shehbaz
Sinapis arvensis L.
NATURALIZED Stem: (0.5)2--10(21) dm, simple or branched, hairs spreading to reflexed, occasionally glabrous. Leaf: basal blade (3)4--18(25) cm, 1.5--5(7) cm wide, obovate to oblong or lanceolate, pinnately lobed; lateral lobes 1--4 pairs, dentate; cauline short-petioled (sessile), dentate. Flower: sepals (4.5)5--6(7) mm; petals (8)9--12(17) mm, (3)4--6(7.5) mm wide, yellow. Fruit: (1.5)2--4.5(5.7) cm, (1.5)2.5--3.5(4) mm wide; lower segment (0.6)1.2--3.5(4.3) cm; terminal segment seedless or 1-seeded; pedicel ascending, (2)3--7 mm. Seed: (1)1.5--2 mm wide. Chromosomes: 2n=18. Ecology: Disturbed areas; Elevation: < 1800 m. Bioregional Distribution: CA-FP (exc SNH); Distribution Outside California: widespread North America, native to Eurasia. Flowering Time: Mar--Oct Unabridged Synonyms: Brassica kaber (DC.) L.C. Wheeler Jepson eFlora Author: Ihsan A. Al-Shehbaz Index of California Plant Names (ICPN; linked via the Jepson Online Interchange) View the CDFA Pest Rating page for Sinapis arvensis Weed listed by Cal-IPC Previous taxon: Sinapis alba Next taxon: Sisymbrium
Citation for this treatment: Ihsan A. Al-Shehbaz 2012, Sinapis arvensis, in Jepson Flora Project (eds.) Jepson eFlora, https://ucjeps.berkeley.edu/eflora/eflora_display.php?tid=44609, accessed on March 28, 2024.
Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora, https://ucjeps.berkeley.edu/eflora/, accessed on March 28, 2024.
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