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. integrifolium (Torr. & A. Gray) Endl.

Biennial
Stem 4.5–17 dm, straight, glabrous, glaucous; branches 0 or above
Leaves: basal 5–31 cm, oblong to obovate, ± entire, thickish, ± glaucous; cauline sessile, 2–8 cm, narrowed to base, ± without basal lobes, entire to ± dentate, thickish, glabrous
Flower: petals 6–9 mm, not crinkled
Fruit spreading to ascending, cylindric to ± flat, ± narrowed between seeds; pedicel straight, rarely ± curved; style 0.5–1.5 mm, slender
Seed: embryonic roots ± near edge on back of 1 cotyledon
Ecology: Generally sandy, silty, or alkaline soils
Elevation: 700–2500 m.
Bioregional distribution: Great Basin Floristic Province, Mojave Desert
Distribution outside California: to Washington, Rocky Mtns

Native

subsp. affine (Greene) Al-Shehbaz


Flower: petals white
Fruit 2–4 cm, upcurved; stalk above receptacle 1–3 mm; pedicel generally spreading, 6–13 mm, straight to ± curved, whitish, base ± flat
Ecology: Among shrubs, low dunes, meadows
Elevation: 700–1100 m.
Bioregional distribution: East of Sierra Nevada, Mojave Desert
Distribution outside California: to Utah

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