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.

THELYPODIUM

Winter annual to biennial, perennial herb; hairs 0 or simple
Stem generally erect, branched or not
Leaves: basal generally rosetted, petioled, generally shed early, entire to pinnately lobed; cauline petioled or sessile, often clasping
Flower: sepals erect to reflexed, greenish, white, lavender, or purplish, bases sac-like or not; petals linear to oblanceolate, white, lavender, or purple; stamens equal or 4 long, 2 short, paired filaments rarely ± fused
Fruit erect or spreading, narrowly linear, ± narrowed between seeds, cylindric or ± flat parallel to septum, generally stalked above receptacle; pedicel ± flat at base or not, generally expanded at tip; stigma in width < style tip, generally entire
Seeds 1 row per chamber, ± flat; wing generally 0; embryonic root at edge or toward back of 1 cotyledon
Species in genus: 20 species: w North America
Etymology: (Greek: female foot, from fruit stalk above receptacle)
Reference: [Al-Shehbaz 1973 Contr Gray Herb 204:1–148]

Native

T. laciniatum (Hook.) Endl.

Biennial
Stem 2.5–10(14) dm, branched, glabrous, solid, not inflated
Leaves: basal and lower cauline petioled, lanceolate to deltate-lanceolate, generally pinnately lobed, thickish; middle, upper cauline entire to dentate, base tapered, tip often acuminate
Inflorescence dense
Flower: petals linear, white to purplish, ± crinkled
Fruit spreading, 3.5–10 cm, flat parallel to septum to cylindric, rarely ± 4-sided, ± narrowed between seeds; stalk above receptacle 1–5 mm; pedicel spreading, rarely ascending, 3–7(15) mm, ± straight, stout; base flat; style 0.7–2.5 mm, stout
Seed: embryonic root at edge of 1 cotyledon
Ecology: Rocky hillsides, basaltic cliffs
Elevation: 600–1900 m.
Bioregional distribution: Cascade Range, Great Basin Floristic Province
Distribution outside California: to British Columbia, Idaho
Flowering time: May–Jun

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