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.

DIPLOTAXIS

WALL ROCKET

Annual, biennial, perennial herb; base woody or not
Stem ascending to erect, generally several, generally branched
Leaves: basal 0 or rosetted or not, pinnately lobed or toothed, petioled; cauline 0 or entire to lobed, petiole short or 0
Inflorescence dense
Flower: inner sepals sac-like at base; petals ± obovate, yellow, rarely violet to white
Fruit linear, often narrowed between seeds, cylindric to ± flat parallel to septum, ± stalked above receptacle; valves cleary 1-veined, glabrous; beak 3-veined, style short or 0
Seeds many, 2 rows per chamber, 0.4–0.7(1) mm; cotyledons doubly folded
Species in genus: ± 25 species: mid latitudes, Old World
Etymology: (Greek: 2-rowed, from seeds)

Introduced

D. muralis (L.) DC.


Stem < 4 dm; hairs 0 or scattered, simple, bristle-like
Leaf oblanceolate to oblong
Flower: petals 5–7 mm, pale yellow
Fruit 25–45 mm (including 1.5–3 mm beak), straight or curved, narrowed between seeds, ± flat; pedicel ascending to ± erect, 5–20 mm
Chromosomes: 2n=22,42
Ecology: Uncommon. Waste places, dry streambeds
Elevation: < 200 m.
Bioregional distribution: South Coast, expected elsewhere
Distribution outside California: native to Europe

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