TREATMENT FROM THE JEPSON MANUAL (1993) |
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©Copyright 1993 by the Regents of the University of California
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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
Seed 1
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.
Native |
Perennial, glabrous
Stems clustered, ascending, 35 dm
Leaf: leaflets 57, 1020 mm, widely ovate to elliptic
Inflorescence (minus corolla) ± 1216 mm wide, ovoid to cylindric, compact, not exposing axis in fruit
Flower: calyx 46 mm, tube not slit, thinly papery, with long, ± appressed, silky hairs; petals 79 mm, lavender to purple; stamens 5
Ecology: Open, rocky hillsides
Elevation: 1700 m.
Bioregional distribution: Modoc Plateau (Shaffer Mtn, Lassen Co.)
Distribution outside California: to Washington, Idaho, Nevada
Synonyms: Petalostemon o. Hook