Jepson Flora Project: Jepson Interchange    

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


D. tenuifolia (L.) DC.

Stem 3–7 dm; branches 0–many; hairs 0 or scattered, simple, ± not bristle-like
Leaves: lower linear-oblong to spoon-shaped, entire to coarsely lobed, strong-smelling when crushed; upper leaves entire or lobes linear
Flower: petals ± 11 mm, widely obovate, lemon-yellow
Fruit 20–45 mm (including 1–2.5 mm beak), straight, generally not narrowed between seeds, ± cylindric; pedicel ± erect to ascending, 20–45 mm
Chromosomes: 2n=22
Ecology: Uncommon. Disturbed sites
Elevation: < 300 m.
Bioregional distribution: Sacramento Valley, South Coast, expected elsewhere
Distribution outside California: native to Europe

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bioregional map for DIPLOTAXIS%20tenuifolia being generated
YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps).

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