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.



Annual to tree
Leaves generally compound, alternate, stipuled; leaflets generally entire
Inflorescence: generally raceme, spike, umbel or head; flowers sometime 1–2 in axils
Flowers generally bisexual, generally bilateral; hypanthium generally flat or cup-like; sepals generally 5, fused; petals generally 5, free, or the 2 lower ± fused; stamens 1–many, often 10 with 9 filaments at least partly fused, 1 (uppermost) free; pistil 1, ovary superior, generally 1-chambered, ovules 1–many, style, stigma 1
Fruit: legume, sometimes including a stalk-like base above receptacle, dehiscent, or indehiscent and breaking into 1-seeded segments, or indehiscent, 1-seeded, and achene-like
Seeds 1–several, often ± reniform, generally hard, smooth
Genera in family: ± 650 genera, 18,000 species: worldwide; with grasses, requisite in agriculture and most natural ecosystems. Many cultivated, most importantly Arachis , peanut; Glycine , soybean; Phaseolus , beans; Medicago ; Trifolium ; and many orns
Reference: [Polhill & Raven (eds) 1981 Advances in legume systematics; Allen & Allen 1981 Leguminosae]
Family description and key to genera by Duane Isely.



Elizabeth McClintock

Shrub, tree, unarmed
Leaves simple, alternate, cordate to reniform, ± leathery, glabrous
Inflorescence umbel-like, axillary on short spur or ± sessile on woody branches
Flowers bilateral, appearing before leaves; sepals fused at base; petals pink, upper one inside lateral ones in bud, keel petals free; stamens 10, generally included, free
Fruit dehiscent, oblong, flat
Species in genus: 5–7 species: n hemisphere
Etymology: (Greek: applied perhaps to a poplar, but also to C. siliquastrum , Judas tree)
Reference: [Isley 1975 Mem New York Bot Gard 25(2):134–150]


C. occidentalis Torr.


Tree < 7 m, glabrous
Leaf deciduous, < 10 cm; petiole 15–20 mm
Inflorescence 2–5-flowered
Flower: keel petals 12–13 mm, > wings and banner
Fruit 5–8 cm
Ecology: Dry, shrubby slopes, canyons, ravines, streambanks, chaparral, foothill woodlands to yellow-pine forest
Elevation: 100–1500 m.
Bioregional distribution: Northwestern California, Cascade Range, Sierra Nevada, San Joaquin Valley, Peninsular Ranges
Horticultural information: DRN, SUN: 4, 5, 6, 14, 15, 16, 17, 18, 22, 23, 24; &IRR or part SHD: 1, 2, 3, 7, 8, 9, 12, 19, 20, 21; also STBL; CVS.

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