Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit 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. campestris S. Watson

SOUTHERN JEWELFLOWER

Biennial? or short-lived perennial herb 6–15 dm, stout, simple to few-branched, glabrous
Leaves: basal < 10 cm, oblanceolate to obovate, fleshy, obtuse, generally dentate, teeth bristly, petiole margins ± ciliate; cauline narrowly ovate, acute
Flower: sepals 7–10 mm, purple, tips bristly, margins scarious; petals 9–12 mm, bases light yellow, tips light purple; filaments free, anthers exserted, equal; stigma 2-lobed
Fruit spreading to ascending, 6–14 cm, 2.5–3.5 mm wide, curved
Seed oblong, winged
Ecology: Open, rocky coniferous forest, chaparral, woodland
Elevation: 900–2300 m.
Bioregional distribution: Transverse Ranges, Peninsular Ranges
Distribution outside California: n Baja California
Plants from s CaR and n SNF, with mid-stem leaves ± oblanceolate and yellow (purple-tipped) petals, are an undescribed taxon.
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for STREPTANTHUS%20campestris being generated
 
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Retrieve Jepson Interchange Index to Plant Names entry for Streptanthus campestris
Retrieve dichotomous key for Streptanthus
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