Jepson Flora Project: Jepson Interchange    

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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.


Species in genus: 1 sp
Etymology: (Latin: small Streptanthus )


S. longirostris (S. Watson) Rydb.

Annual, generally glaucous; hairs 0 or below, sparse, minute, simple
Stem generally 1; branches many, rarely 0
Leaves: basal, lower cauline (2)3–6 cm, narrowly oblanceolate, wavy-margined, entire to dentate, rarely lobed; upper cauline ± linear, clasping stem or not, generally entire
Flower: sepals 2–3 mm, upper surface greenish to purple, lower surface white; petals 3–4 mm, narrowly spoon-shaped, white to yellowish with purple veins, blades wavy; anthers < 1 mm, generally ± exserted
Fruit pendent, 35–45 mm, ± 1.5 mm wide, linear, flat parallel to septum; pedicel downcurved to reflexed, 1.5–3 mm; valves ± 3.5 mm, narrowed to a beak-like, indehiscent tip; style ± 0
Seed flat; wing narrow; embryonic root at back of 1 cotyledon
Chromosomes: 2n=28
Ecology: Common. Sandy soils, desert scrub, woodland
Elevation: < 2000 m.
Bioregional distribution: s San Joaquin Valley, Inner South Coast Ranges, Southwestern California, White and Inyo Mountains, Desert
Distribution outside California: to Washington, Colorado, New Mexico, Baja California
Flowering time: Mar–May
Synonyms: var. derelicta Howell

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bioregional map for STREPTANTHELLA%20longirostris 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 Streptanthella longirostris
Retrieve dichotomous key for Streptanthella
Overlay Consortium of California Herbaria specimen data by county on this map
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