TREATMENT FROM THE JEPSON MANUAL (1993) |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
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, unarmed
Leaves even-1-pinnate; stipules generally deciduous; leaflets generally many
Inflorescence: raceme, axillary; bractlets sometimes appressed to calyx base
Flower: calyx lobes subequal, < tube; corolla generally yellow, dark-spotted; 9 filaments fused, 1 free
Fruit generally dehiscent, linear or oblong, 4-sided
Seeds fewmany
Species in genus: ± 60 species: tropical, warm regions
Etymology: (Ancient Arabic name)
Native |
Stem erect, simple or branched, 13 m
Leaf: leaflets 3060, 12.5 cm, oblong
Inflorescence 26-flowered
Flower: corolla 11.5 cm, yellowish or mottled
Fruit 1520 cm, 23 mm wide, linear
Seeds many
Chromosomes: 2n=12
Ecology: Along streams, other moist sites, often In cultivation or old fields
Elevation: < 500 m.
Bioregional distribution: Sonoran Desert, probably elsewhere
Distribution outside California: to se US
Flowering time: AprOct
Horticultural information: IRR: 8, 9, 11, 12, 13, 14; STBL.