TREATMENT FROM THE JEPSON MANUAL (1993) |
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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.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 36:3340; 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.
Native S. albidus Greene
Annual 212 dm, simple to much-branched, generally sparsely (rarely ± densely) bristly below
Leaves < 13(22) cm; basal narrowly oblanceolate, coarsely dentate, petioles short, winged; cauline linear-lanceolate, lower ± coarsely dentate, upper ± entire
Flower: calyx ± bilateral, sepals 510 mm, glabrous; petals 814 mm, upper > lower; upper filament pair exserted, ± fused or adherent, with reduced anthers
Fruit spreading to ascending, 412 cm, straight
Seed: wing at 1 end
Chromosomes: 2n=28
Ecology: Open, grassy or ± barren slopes, often serpentine
Elevation: ± 150800 m.
Bioregional distribution: e San Francisco Bay Area, c Outer South Coast Ranges.
Native subsp. albidus
METCALF CANYON JEWELFLOWER
Plant 512 dm
Flower: sepals white or greenish white; petals whitish, veins brownish or purplish
Ecology: Serpentine
Elevation: 150800 m.
Bioregional distribution: se San Francisco Bay Area (Santa Clara Co.).
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