|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 or perennial herb, unarmed
Leaves generally palmately compound; stipules conspicuous, partly fused to petiole; leaflets generally 3, sometimes 59, ± serrate or dentate
Inflorescence: raceme (often umbel-like), head, or spike, axillary or terminal, generally many-flowered, often involucred, generally peduncled; flowers bracted or not
Flower generally spreading to erect, often becoming reflexed; corolla generally purple to pale lavender, sometimes yellow, persistent after flower; 9 filaments fused, 1 free
Fruit generally indehiscent, but often breaking, short, plump, generally included in corolla; base often stalk-like
Etymology: (Latin: 3 leaves)
Reference: [Gillett 1980 Can J Bot 58:14251558; Zohary & Heller 1984 Genus Trifolium]
Annual, glabrousSee the CNPS Inventory for information about endangerment and rarity.
Stem decumbent to ascending
Leaves cauline; stipules with many bristle-tipped teeth; leaflets 0.51.5 cm, elliptic to obovate, finely serrate
Inflorescence head-like, 812 mm wide, 5many-flowered; involucre bowl-shaped, irregularly toothed and cut
Flower: calyx tube 45 mm, 10-veined, lobes < tube, with 35 tiny, lateral teeth, ending in a 11.5 mm bristle; corolla 67 mm, pale pink or white, keel darker
Ecology: Uncommon. Grassy or waste areas
Elevation: < 200 m.
Bioregional distribution: sw San Francisco Bay Area (Santa Cruz Co.). First heads enclosed in stipules, reduced, seeming cleistogamous.