|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
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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 1many 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 80:686699; Rollins 1993 Cruciferae of Continental North America. Stanford Univ Press]
Family description, key to genera by Robert A. Price.
Roy E. Buck, Dean W. Taylor, and Arthur R. KruckebergAnnual to perennial herb, glabrous to bristly, generally ± glaucous
Leaves ± entire to pinnately compound; basal generally rosetted, generally ± petioled; cauline linear to (ob)ovate, often clasping
Inflorescence generally ± open; bracts generally 0
Flower biradial or bilateral; calyx generally ± urn-shaped, sepals erect, generally not green, bases ± pouch-like, generally keeled; petals generally exserted, blade generally narrower than claw, ± channeled, margins ± wavy, generally ± scarious; stamens generally in 3 free pairs; style 0 or short, stigma generally ± entire, blunt
Fruit long, generally strongly compressed parallel to septum
Seeds generally compressed, generally ± winged
Species in genus: ± 40 species: sw US, n Mex
Etymology: (Greek: twisted flower, from wavy-margined petals)
Reference: [Dolan & LaPré 1989 Madroño 36:3340; Kruckeberg & Morrison 1983 Madroño 30:230244]
Caulanthus sometimes including here. Calluses on leaf margins of some mimic pierid butterfly eggs, reducing larval herbivory. Variable, complex; needs study.
S. barbiger GreeneAnnual 18 dm, generally branched throughoutSee the CNPS Inventory for information about endangerment and rarity.
Leaves: basal ± not rosetted, lower blades < 7 cm, oblanceolate to widely obovate, generally coarsely dentate, petioled; middle and upper cauline < 11 cm, ± linear, generally ± entire, generally sessile, sometimes ± clasping
Flower: sepals 36 mm, generally greenish yellow (purplish), generally ± glabrous; petals 510 mm, upper ± whitish, lower generally purple (rarely ± whitish); upper filament pair fused, anthers reduced
Fruit spreading, 27 cm, ± curved, ± narrowed between seeds
Seed: wing 0 or at 1 end
Ecology: Serpentine barrens, chaparral
Elevation: 200500 m.
Bioregional distribution: s North Coast Ranges, High North Coast Ranges.Variable; intergrades with S. batrachopus in Sonoma Co., S. breweri in Napa, Lake cos. Plants from w-c Tehama Co. with hairy sepals and plants from Lake Co. with deeply clasping cauline leaves are apparently undescribed taxa.
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Retrieve Jepson Interchange Index to Plant Names entry for Streptanthus barbiger
Retrieve dichotomous key for Streptanthus
Overlay Consortium of California Herbaria specimen data by county on this map
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