|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
Annual to tree
Leaves generally compound, alternate, stipuled; leaflets generally entire
Inflorescence: generally raceme, spike, umbel or head; flowers sometime 12 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 1many, often 10 with 9 filaments at least partly fused, 1 (uppermost) free; pistil 1, ovary superior, generally 1-chambered, ovules 1many, 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 1several, 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.
Annual, perennial herb, unarmed, gland-dotted
Leaves generally odd-1-pinnate; stipules inconspicuous, thread-like or glandular
Inflorescence: spike in CA; bracts generally ± conspicuous
Flower: calyx tube 10-ribbed; banner arising from receptacle, other petals from side or top of filament column; stamens 910 or 5, filaments fused; ovules 2
Fruit indehiscent, included in or slightly exserted from calyx
Species in genus: ± 165 species: w US, Mex, s South America
Etymology: (T. Dale, English botanist, 18th century)
Reference: [Barneby 1977 Mem New York Bot Gard 27:135582, 650877]
Incl species sometimes placed in Petalostemon ; except others found here in Marina , Psorothamnus.
Annual or perennial herb, diminutive or mat-forming, hairy
Leaf: leaflets 812, 310 mm, ± round to obovate-oblong, often folded, shallowly lobed, wavy
Inflorescence generally 1416 mm wide, ovoid or short-cylindric; bracts generally 11.5 mm wide
Flower: calyx ± 78 mm, lobes needle-like, generally > tube, shaggy-hairy; petals < sepals, whitish or lavender; stamens 910
Ecology: Common. Desert flats, washes
Elevation: < 900 m.
Bioregional distribution: Desert
Distribution outside California: s Nevada, w Arizona
Horticultural information: DRN, SUN: 10, 11, 12, 13.