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. tortuosus Kellogg

MOUNTAIN JEWELFLOWER

Annual to subshrub 1–10 dm, simple or branched
Leaves: basal generally oblong to widely ovate, generally toothed above middle, coarse, petiole winged; cauline generally round to oblong, entire to dentate, upper often larger, generally narrower
Inflorescence: bract generally 1, ovate, entire
Flower: sepals purple, gray-green, or yellowish; petals widely linear, purple to yellow, tips reflexed; filaments exserted, free, upper pair with ± unreduced, ± fertile anthers; stigma ± sessile, lobes weak
Fruit generally reflexed, 8–12 cm, curved
Chromosomes: 2n=28
Ecology: Generally rocky to sandy soils, in open coniferous forest
Elevation: 200–3500 m.
Bioregional distribution: Klamath Ranges, North Coast Ranges, Cascade Range, Sierra Nevada, n San Francisco Bay Area, Outer South Coast Ranges
Distribution outside California: sw Oregon
Variable, needs study; vars. intergrade. Plants with lanceolate leaves from KR (Burnt Ranch, Trinity Co.) undescribed.

Native

var. orbiculatus (Greene) H.M. Hall

Annual 1–3 dm, generally much-branched
Inflorescence: bracts paler than leaves
Flower: sepals 5–6 mm, purple; petals 7–9 mm, base yellow, tip white, purple-veined
Ecology: Common. Dry slopes, forests
Elevation: 1900–3500 m.
Bioregional distribution: Klamath Ranges, High North Coast Ranges, High Cascade Range, Sierra Nevada
Distribution outside California: sw Oregon
Horticultural information: TRY.

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