Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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



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.



Annual, biennial, erect, generally scabrous, taprooted; hairs simple, rigid
Stem generally branched, especially above
Leaves: basal and lower cauline petioled, generally pinnately lobed to compound, terminal lobe or leaflet widely ovate to round, >> lateral, toothed; upper cauline short-petioled to sessile, ± dentate or few-lobed
Inflorescence many-flowered; bracts 0
Flower: sepals erect, inner pair sac-like at base; petals long-clawed
Fruit indehiscent, longitudinally grooved, especially below, transversely jointed; lower part seedless, very short, or 0; upper part seeded, linear to ovate or dagger-shaped, beaked
Seeds: 1 row per chamber, ± spheric; wing 0; cotyledons doubly folded
Species in genus: 3 species: Medit
Etymology: (Greek: appearing rapidly, from seed germination)


R. raphanistrum L.


Plant hairs sparse
Stem generally 1, 3–8 dm
Leaves: basal 6–20 cm
Flower: petals 15–20 mm
Fruit 4–8 cm (including beak), 3–6 mm wide; pedicel ascending, 10–25 mm
Chromosomes: 2n=18
Ecology: Disturbed areas, fields, roadsides
Elevation: < 800 m.
Bioregional distribution: California Floristic Province, Great Basin Floristic Province
Distribution outside California: N.America; native to Mediterranean Europe
Flowering time: Apr–Jun

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bioregional map for RAPHANUS%20raphanistrum being generated
N.B. The distribution depicted here differs from that given in The Jepson Manual (1993)

Retrieve Jepson Interchange Index to Plant Names entry for Raphanus raphanistrum
Retrieve dichotomous key for Raphanus
Overlay Consortium of California Herbaria specimen data by county on this map
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