Jepson Flora Project: Jepson Interchange    

 
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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. elata M.E. Jones

Perennial, erect, coarse
Stems 1–several, 6–15 dm, glabrous; branches 0 or above
Leaf petioled, thick; hairs 0 or sparse, minute; blade 8–15 cm, 1.5–2.5 cm wide, widely oblong to lance-ovate, entire to sharply toothed, tip obtuse to acute
Inflorescence 6–20 cm, dense
Flower: sepals reflexed, 8–12 mm, linear-oblong, yellowish, glabrous; petals 8–10 mm, ± 1 mm wide, yellow to whitish, glabrous, claw bases wide, blades reduced, ± 1 mm wide; filament bases enlarged, papillate
Fruit spreading to ± recurved, 5–10 cm, ± cylindric; stalk above receptacle ± 20 mm; pedicel spreading, 5–10 mm, glabrous; style ± 1 mm
Seed ± 2 mm, ± 1 mm wide, brown; embryonic root obliquely at back of 1 cotyledon
Chromosomes: 2n=28
Ecology: Among boulders, canyons, scrub
Elevation: 1300–2000 m.
Bioregional distribution: East of Sierra Nevada, Desert Mountains
Distribution outside California: Nevada
Flowering time: May–Jul

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