Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

FABACEAE

LEGUME FAMILY

Annual to tree
Leaves generally compound, alternate, stipuled; leaflets generally entire
Inflorescence: generally raceme, spike, umbel or head; flowers sometime 1–2 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 1–many, often 10 with 9 filaments at least partly fused, 1 (uppermost) free; pistil 1, ovary superior, generally 1-chambered, ovules 1–many, 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 1–several, 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.

LOTUS

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 3–many, often irregularly arranged
Inflorescence: umbel or 1–2-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
Seeds 1–several
Etymology: (Greek: derivation unclear)
Reference: [Isely 1981 Mem New York Bot Garden 25:128–206]
Spp. generally variable; intermediates may be hybrids. Key below separates natural groups.

Native

L. procumbens (Greene) Greene

Perennial or stiff subshrub, puberulent or strigose, often gray
Stem decumbent to erect, generally much-branched, < 1 m
Leaf subpalmate; stipules gland-like; leaflets generally 3, 4–12 mm, oblanceolate to obovate
Inflorescence 1–3-flowered; peduncle 0 or < 3 mm, bract 0
Flower: calyx 2–6 mm, strigose, lobes << or ± = tube; corolla 6–12 mm, yellow or with red, wings > keel
Fruit indehiscent, exserted, pendent, 1–1.5 cm, initially curved, then generally straight
Seeds 2–3
Ecology: Chaparral to pine forest, open slopes, ridges, flats, roadsides
Elevation: < 2300 m.
Bioregional distribution: s Sierra Nevada, Sacramento Valley, South Coast Ranges, Transverse Ranges, Peninsular Ranges, Mojave Desert.

Native

var. jepsonii (Ottley) Ottley


Flower: calyx 4–6 mm, lobes ± = tube; corolla 9–12 mm. Local
Ecology: Open slopes, ridges
Elevation: 1800–2000 m.
Bioregional distribution: s Sierra Nevada (Tulare, Kern cos.).

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