|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, shrub, unarmed
Leaves generally odd-1-pinnate (sometimes ± palmately compound, rarely some or most simple); stipules conspicuous or not; leaflets 3many, often irregularly arranged
Inflorescence: umbel or 12-flowered, axillary, generally peduncled, often bracted
Flower: corolla generally yellow (sometimes white or pink), fading darker; 9 filaments fused, 1 free
Fruit dehiscent or not, exserted from calyx or not, ovoid to oblong, ± beaked
Etymology: (Greek: derivation unclear)
Reference: [Isely 1981 Mem New York Bot Garden 25:128206]
Spp. generally variable; intermediates may be hybrids. Key below separates natural groups.
Perennial, conspicuously hairy
Stems mat-forming or ascending
Leaf subpinnate or palmate; stipules gland-like; leaflets 35, irregularly arrayed, 412 mm, obovate to oblong, generally green
Inflorescence 312-flowered; peduncle generally bracted
Flower: calyx 49 mm, lobes < tube; corolla 510 mm
Fruit indehiscent; body exserted, tapered-oblong, bent; beak slender, recurved
Ecology: Oak, yellow-pine, lodgepole, and fir forests, open bracken meadows
Elevation: 8502750 m.
Bioregional distribution: Klamath Ranges, North Coast Ranges, Cascade Range, Sierra Nevada, Central Coast, South Coast, Transverse Ranges, Peninsular Ranges, Desert Mountains
Distribution outside California: to British Columbia, Idaho, Nevada
Forms intermediates with L. argophyllus, L. scoparius. Many named variants.
Leaf: axis (including petiole) generally 25 mm
Inflorescence generally 35-flowered
Flower 67 mm, blocky; banner upcurved ± 90°, generally drying dark
Fruit generally 22.2 mm wide
Ecology: Open places, oak to pine forests
Elevation: 12002750 m.
Bioregional distribution: Transverse Ranges, ne Peninsular Ranges
Synonyms: L. davidsonii Greene
Merges with var. nevadensis in adjacent areas.