|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.
Perennial, shrub, small tree, generally with thorns, gland-dotted
Stem generally intricately branched
Leaves odd-1-pinnate or simple
Inflorescence: raceme, sometimes spike- or head-like, axillary or terminal; pedicels generally with bractlets
Flower: calyx lobes generally unequal, upper pair often largest; petals all arising from receptacle, violet, blue, or 2-colored (purple and white); stamens 10, filaments partly fused; ovules generally 2
Fruit indehiscent, included in or exserted from calyx, generally glandular
Species in genus: 9 species: sw US, Mex
Etymology: (Greek: scabshrub)
Reference: [Barneby 1977 Mem New York Bot Garden 27:2154, 598607]
Shrub < 1 m, generally silvery-strigose
Leaf: leaflets 325 mm, linear to ovate, generally jointed to axis, except uppermost
Inflorescence: raceme, ± open; pedicels with bractlets
Flower: calyx 59 mm, lobes unequal, < tube; corolla 79.5 mm, violet-purple
Fruit exserted, 710 mm, glabrous; small glands forming longitudinal lines
Ecology: Granite and volcanic slopes, flats, canyons
Elevation: 2501350 m.
Bioregional distribution: e Desert Mountains, e Sonoran Desert
Distribution outside California: to s Utah, Arizona
Like P. arborescens except in fruit, geography
Horticultural information: TRY.
See the CNPS Inventory for information about endangerment and rarity.
Leaf: leaflets linear, < ± 1 mm wide
Ecology: Uncommon. Habitats of sp.
Elevation: 450900 m.
Bioregional distribution: e Sonoran Desert (se San Bernardino Co.)
Distribution outside California: s Nevada, Arizona