Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

BRASSICACEAE

MUSTARD FAMILY

Reed C. Rollins, except as specified

Annual to subshrub
Leaves generally basal and cauline, alternate, generally simple; stipules 0
Inflorescence: generally raceme
Flower bisexual; sepals 4, free; petals (0)4, free, generally white or yellow, often clawed; stamens generally (2,4)6, generally 4 long, 2 short; ovary 1, superior, chambers generally 2, septum membranous, connecting 2 parietal placentas, style 1, stigma simple or 2-lobed
Fruit: generally capsule ("silique") with 2 deciduous valves, sometimes breaking transversely or indehiscent
Seeds 1–many per chamber
Genera in family: 300+ genera, 3000+ species: worldwide, especially cool regions; some cultivated for food (especially Brassica, Raphanus ) and ornamental
Recent taxonomic note: Recently treated to include Capparaceae [Rodman et al. 1993 Ann Missouri Bot Gard 80:686–699; Rollins 1993 Cruciferae of Continental North America. Stanford Univ Press]
Family description, key to genera by Robert A. Price.

ERUCASTRUM

Annual to rarely subshrub; hairs simple, rarely 0
Leaves: basal petioled, entire or generally deeply pinnately lobed to compound; cauline ± as basal, generally simpler, upper generally sessile, ± clasping stem or not
Flower: sepals erect, linear to oblong, bases not sac-like; petals generally obovate, yellowish or white
Fruit linear, ± 4-sided, ± narrowed between seeds, sessile or short-stalked above receptacle, beaked, hairy or not
Seeds 1 row per chamber, oblong to ovate, plump; wing 0; cotyledons doubly folded
Species in genus: ± 18 species: especially Africa
Etymology: (Latin: ± resembling Eruca )

Introduced

E. gallicum (Willd.) O.E. Schulz

Annual, biennial; hairs stiff, recurved
Stem simple to much-branched, 1.5–8 dm
Leaf deeply pinnately lobed, 3–20 cm; margins often wavy
Inflorescence open; bracts subtending each flower, lower leaf-like
Flower: petals 4–7 mm, pale yellow
Fruit 1–4.5 cm; pedicel ascending, < 1 cm, slender; valves strongly 1-veined; style 1.5–3 mm
Chromosomes: 2n=30
Ecology: Disturbed areas, roadsides
Elevation: < 200 m.
Bioregional distribution: s San Francisco Bay Area
Distribution outside California: e US; native to Eurasia

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