Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California

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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.

AESCHYNOMENE

James C. Hickman

Perennial or shrub, unarmed
Stem erect
Leaves even-1-pinnate; main axis ending in a tiny bristle; leaflets alternate or opposite, many, small, sensitive to touch
Flower: corolla white to red or purple; filaments partly fused, generally splitting into 2 groups of 5
Fruit ± narrowed between seeds, breaking into 1-seeded segments
Species in genus: ± 150 species: especially standing water, tropical and warm regions.

Introduced

A. rudis Benth.

Plant somewhat bristly-hairy, finely gland-dotted
Stem emergent
Leaf: stipule ± peltate, deciduous, lower lobe rounded to fringed; leaflets generally 9–10 mm, entire or minutely serrate
Flower: corolla 8–15 mm, whitish, purple-tinged
Fruit 4–7 mm wide; lower margin indented between seeds; stalk-like base 4–10 mm
Ecology: Rice fields
Elevation: < 20 m.
Bioregional distribution: Sacramento Valley (ne Colusa Co.), expected more widely
Distribution outside California: se US; native to Asia
Range as rice-field weed apparently expanding.

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bioregional map for AESCHYNOMENE%20rudis being generated
 


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