Jepson Flora Project: Jepson Interchange    

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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

  • Up-to-date information about California vascular plants is available from the Jepson eFlora.



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.


Species in genus: 1 sp
Etymology: (Greek: visible stem)


P. cheiranthoides Torr. & A. Gray

Perennial, ± cespitose; taproot thick, deep; caudex branches covered with old leaf bases
Stem ± scapose, 0.5–2 dm
Leaves simple, entire, gray or whitish; hairs dense, multibranched; basal densely clustered, 3–15 cm, petioled
Inflorescence many-flowered
Flower: sepals erect, 3–6 mm, often pink or purplish, especially on margin; petals 6–15 mm, obovate-oblanceolate, blade narrow, clawed, pinkish to reddish purple; anthers 1.5–2 mm
Fruit ± spreading, 1.5–8 cm, 2–5 mm wide, ± lanceolate, flat parallel to septum, glabrous; pedicel ± spreading, 1–3 cm; valve midrib prominent; style ± 1 mm, stigma ± unlobed
Seeds 3–6, 2 rows per chamber, 3–4 mm, smooth; wing 0; embryonic root at edges of both cotyledons, rarely at edge of one
Ecology: Common. Basalt outcrops, clay soils, slopes
Elevation: 1500–3200 m.
Bioregional distribution: Northwestern California, Cascade Range, Great Basin Floristic Province
Distribution outside California: to Washington, Idaho
Flowering time: May–Jul
Synonyms: subsp. glabra (Jeps.) Abrams
Horticultural information: TRY; DFCLT.

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