Perennial Peanut
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Perennial Peanut
P Introduced Photo: Gary Thingnam
Common name: Perennial Peanut, Rhizoma peanut, Creeping forage peanut
Botanical name: Arachis glabrata    Family: Fabaceae (Pea family)

Perennial Peanut is grown as a forage crop and an ornamental groundcover plant. Flowers are stalkless, in leaf-axils; hypanthium thread-like, tubular, up to 10 cm long, hairy, containing the ovary at its base; standard more or less round, 1.5-2.5 cm wide, yellow, soft orange to brilliant orange without red veins on back. It is a perennial herb with erect to prostrate unbranched stems with a deep, woody taproot and a dense mat of rhizomes. Leaves are tetrafoliolate; leaflets ranging from linear-lanceshaped to inverted-lanceshaped, obovate or wedge-shaped up to 4 cm x 2 cm; tip pointed to with a short sharp point, base mostly blunt, hairless to sparsely velvet-hairy; leaf-stalk grooved, up to 7.5 cm long, 1-2 mm diameter with pulvinus 1-1.5 cm above axil. Stipules linear-lanceshaped, sickle shaped, up to 3 cm long, adnate to the leaf-stalk and membranous below the pulvinus; leaflet-stalk about 1 mm and axis 1-1.5 cm long. Fruit set geocarpic, but usually scarce; fruit ovoid about 10 mm x 5-6 mm; seeds ovoid, whitish. It is nitrogen fixing via rhizobial associations and tolerant of a wide range of soil and moisture conditions. Perennial Peanut is native to E. Bolivia to Central Brazil and NE. Argentina.

Identification credit: Tabish Photographed in Langol, Manipur.

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