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.

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. viridiflora Torr. & A. Gray

Perennial, glabrous throughout; caudex simple, covered with old leaf bases
Stem 1, erect, 3–12 dm; branches 0 or above
Leaves: basal many, clustered, petioled, 1–3 dm, oblanceolate to obovate, entire or dentate, rarely dissected; middle and upper cauline sessile, clasping stem, lanceolate to ovate, entire to few-toothed
Inflorescence 1–5 dm
Flower: sepals 12–16 mm, linear-oblong; petals 15–20 mm, 2–3 mm wide, lemon-yellow to ± white; stamens >> petals, ± equal
Fruit ± spreading, 4–7 cm, ± cylindric, arched; stalk above receptacle 15–25 mm; pedicel spreading, 4–7 mm, stout
Seed 2–3 mm, ± 1.5 mm wide, oblong; wing 0; embryonic root at edges of both cotyledons
Chromosomes: 2n=24,28
Ecology: Cliffs, shales, clay knolls, white ash deposits
Elevation: ± 1300 m.
Bioregional distribution: s Modoc Plateau (Lassen Co.)
Distribution outside California: to Rocky Mtns
See the CNPS Inventory for information about endangerment and rarity.
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bioregional map for STANLEYA%20viridiflora being generated
 


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