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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  • 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.

STREPTANTHUS

JEWELFLOWER

Roy E. Buck, Dean W. Taylor, and Arthur R. Kruckeberg

Annual 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 36:33–40; Kruckeberg & Morrison 1983 Madroño 30:230–244]
Caulanthus sometimes including here. Calluses on leaf margins of some mimic pierid butterfly eggs, reducing larval herbivory. Variable, complex; needs study.

Native

S. drepanoides Kruckeb. & J.L. Morrison

SICKLE-FRUIT JEWELFLOWER

Annual < 4 dm, simple to spreading-branched, glabrous
Leaves < 7 cm; lower generally ± round, entire or short-dentate, especially toward tip; basal ± sessile or short-petioled; lower cauline overlapping, 2-ranked, deeply clasping; middle and upper cauline generally ± ovate
Flower: sepals 4–8 mm, generally greenish yellow (greenish white or purplish), generally glabrous; petals 5–10 mm, upper whitish or purple-veined, lower ± purple; upper filament pair exserted, fused, with reduced anthers, lower fused in basal 2/3 or less
Fruit spreading, 3–9 cm, ± straight to strongly curved, ± narrowed between seeds
Seed: wing 0 or at 1 end
Chromosomes: 2n=28
Ecology: UNCOMMON. Open chaparral or Jeffrey-pine woodland, on serpentine
Elevation: 400–1600 m.
Bioregional distribution: s-most Klamath Ranges, High North Coast Ranges, n Inner North Coast Ranges, n Sierra Nevada Foothills (Butte Co.).
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for STREPTANTHUS%20drepanoides being generated
 


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