Calopo

Perennial, Herbs, Nodules present, Stems prostrate, trailing, or mat forming, Stems 1-2 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Stems hairs pilose or spreading, Leaves alternate, Leaves petiolate, Stipules inconspicuous, absent, or caducous, Stipules membranous or chartaceous, Leaves compound, Leaves pinnately 3-foliolate, Leaf or leaflet margins entire, Leaflets opposite, Stipels present at base of leaflets, Leaflets 3, Leaves hairy on one or both surfaces, Flowers in axillary clusters or few-floweredracemes, 2-6 flowers, Inflorescences racemes, Inflorescence axillary, Bracts conspicuously present, Bracts very small, absent or caducous, Bracteoles pres ent, Flowers sessile or nearly so, Flowers zygomorphic, Calyx 5-lobed, Calyx 2-lipped or 2-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals blue, lavander to purple, or violet, Banner petal ovoid or obovate, Banner petal auriculate, Wing petals narrow, oblanceolate to oblong, Keel tips obtuse or rounded, not beaked, Keel petals fused on sides or at tip, Stamens 9-10, Stamens diadelphous, 9 united, 1 free, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit internally septate between the seeds, Fruit explosively or elastically dehiscent, Fruit glabrous or glabrate, Fruit hairy, Fruit 3-10 seeded, Seed surface smooth, Seeds olive, brown, or black.

Calopogonium mucunoides, called calopo and wild ground nut, is a species of flowering plant in the family Fabaceae, native to the New World Tropics, and introduced as a forage crop and a green manure to the tropics of Africa, Madagascar, the Indian Subcontinent, Asia, Malesia, Papuasia, and Australia. In some locales it has become a serious invasive species.