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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.

STANLEYA

PRINCE'S PLUME

Annual, perennial herb, shrub, often glaucous; hairs 0 or simple
Stem 2–15 dm, branched or not
Leaves: basal clustered or not; cauline petioled or not, entire to deeply lobed
Inflorescence dense, generally > 1 dm; buds club-shaped
Flower: sepals spreading to reflexed, linear-oblong; petals generally conspicuous, yellow to white; filaments ± equal, >> petals
Fruit linear, flat parallel to septum or ± cylindric; stalk above receptacle 1–3 cm; style ± 0 or short
Seed oblong; margin 0; embryonic root at edges of 1 or both cotyledons
Species in genus: 6 species: w US
Etymology: (E. Stanley, English ornithologist, 19th century)
Concentrates selenium to TOXIC levels, but rarely eaten.

Native

S. pinnata (Pursh) Britton


Stems several–many, 4–15 dm, glaucous; hairs 0 or sparse; base branched, woody
Leaves petioled; basal and lower cauline 5–15 cm, 2–5 cm wide, widely lanceolate, deeply pinnately lobed, hairs 0 or short; upper cauline linear-lanceolate to ovate, entire or few-lobed
Inflorescence 1–3 dm, dense; buds yellowish
Flower: sepals spreading or reflexed, 10–15 mm; petals 10–18 mm, yellow, claws with dense, long, wavy hairs on inner side; stamens >> petals, ± equal
Fruit spreading to ± downcurved, 3–8 cm, ± cylindric; stalk above receptacle 10–25 mm; pedicel spreading, 6–12 mm, hairs 0 or few
Seed ± 2 mm, oblong, plump; embryonic root at back of 1 cotyledon
Ecology: Generally open sites, slopes, canyons
Elevation: < 1850 m.
Bioregional distribution: s Sierra Nevada Foothills, San Joaquin Valley, South Coast Ranges, South Coast, Western Transverse Ranges, San Gabriel Mountains, Peninsular Ranges, Great Basin Floristic Province, Mojave Desert
Distribution outside California: to c US

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