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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 Medit area, mtns of sw Asia, adjacent c Asia, w 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 c 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 s NCoRO, CCo. Cardaria, Coronopus moved to Lepidium; Caulostramina to Hesperidanthus; Guillenia to Caulanthus; Heterodraba to Athysanus; CA taxa of Lesquerella to Physaria; Malcolmia africana to Strigosella. —Scientific Editors: Douglas H. Goldman, Bruce G. Baldwin.

Key to Brassicaceae

BRASSICA MUSTARD
Annual to perennial herb; hairs simple or 0.
Stem: erect, simple or branched, glabrous or hairy distally.
Leaf: basal petioled, generally rosetted, dentate to pinnately lobed; cauline petioled or sessile, bases lobed or not.
Inflorescence: terminal.
Flower: sepals erect to ascending, base generally not sac-like; petals generally yellow, clawed.
Fruit: silique, linear, dehiscent, segmented, round or 4-sided to flat parallel to septum; valves 1-veined, glabrous; terminal segment conic to cylindric, 0–3-seeded; stigma entire to ± 2-lobed.
Seed: (4)10–50, in 1 row, spheric to ovoid.
35 species: Medit, Eurasia, some naturalized ± worldwide. (Latin: cabbage) Brassica including most important vegetable, seed-oil, condiment crops in Brassicaceae.

Key to Brassica

B. rapa L. TURNIP, FIELD MUSTARD
NATURALIZED
Annual, biennial, erect; hairs 0 or few.
Stem: 3–10 dm, simple or branched.
Leaf: basal pinnately lobed, lateral lobes 2–4(6) pairs, terminal lobe obovate, wavy- dentate; middle, distal cauline sessile, base lobed, generally clasping.
Flower: overtopping buds; sepals (3)4–6.5(8) mm; petals 6–11(13) mm, (2.5)3–6(7) mm wide.
Fruit: ascending to ± spreading, (2)3–8(11) cm, 2–4(5) mm wide; terminal segment 8–22 mm; pedicel ascending to spreading, (0.5)1–2.5(3) cm.
Seed: 1.1–2 mm wide, spheric.
2n=20. Disturbed areas; < 1500 m. California Floristic Province, East of Sierra Nevada; widespread North America, native to Europe. Jan–May {Weed listed by BAEDN and Cal-IPCI} [Online Interchange]
Unabridged synonyms: [Brassica campestris L.]
Unabridged note: There are Consortium records that, if verified, would voucher elevations up to 2377 m.

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Next taxon: Brassica tournefortii

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].

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Bioregions in which taxon occursRed area (if present) is the part of the bioregion lying between the upper and lower elevation limits of the taxon;
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.
map of distribution 1

Chart based on elevation range in Manual and elevations and coordinates of CCH records.
Data provided by the participants of the Consortium of California Herbaria.
Note: About half of the CCH records include both elevation and coordinates.
Map made in collaboration with Scott Loarie. Data provided by the participants of the Consortium of California Herbaria.
View all CCH records

 

CCH collections by month

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