Derris scandens (Roxb.) Benth.

Climbing shrub, branches sparsely pubescent. Leaf imparipinnate, 7-15 cm long; leaflets 9-19, c. 2.5-5.0 cm long, oblong or obovate-oblong, obtuse or acute, glabrous to subglabrous above, pubescent below; petiolule short. Inflorescence a long, axillary raceme, twice as long as the leaf. Pedicel c. 4-6.5 mm long. Calyx c. 3.5 mm long, silky pubescent, teeth obscure. Corolla pale rose. Vexillum c. 10-11 mm long. Fruit c. 2.5-7.5 cm long, c. 9-12 mm broad, glabrous, narrowed at both ends, 1-4-seeded, wings not more than 1.5 mm broad.

Distribution: Cultivated in Karachi gardens; widely distributed in India; Ceylon; E. Pakistan, S.E. Asia, China and N. Australia.

Perennial, Vines, twining, climbing, Woody throughout, Nodules present, Stems or branches arching, spreading or decumbent, Stems greater than 2 m tall, Stems solid, Stems or young twigs glabrous or sparsely glabrate, Leaves alternate, Leaves petiolate, Stipules inconspicuous, absent, or caducous, Leaves com pound, Leaves pinnately 3-foliolate, Leaves odd pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 3, Leaves glabrous or nearly so, Inflorescences racemes, Inflorescence panicles, Inflorescence axillary, Bracts very small, absent or caducous, Bracteoles present, Flowers zygomorphic, Calyx 5-lobed, Calyx glabrous, Petals separate, Corolla papilionaceous, Petals clawed, Petals white, Petals pinkish to rose, Banner petal ovoid or obovate, Banner petal suborbicular, broadly rounded, Banner petal auriculate, Wing petals narrow, oblanceolate to oblong, Stamens 9-10, Stamens monadelphous, united below, Filaments glabrous, Style terete, Fruit a legume, Fruit unilocular, Fruit indehiscent, Fruit oblong or ellipsoidal, Fruits winged, carinate, or samaroid, Fruit exserted from calyx, Fruit inflated or turgid, Fruit glabrous or glabrate, Fruit 1-seeded, Fruit 2-seeded, Seeds ovoid to rounded in outline, Seeds reniform, Seed surface smooth, Seeds olive, brown, or black .

Derris scandens is a plant species in the genus Derris of the family Fabaceae. It grows throughout the Indian subcontinent, Southeast Asia, Malesia and Australasia. It has been used as a herb in Thai traditional medicine for the treatment of musculoskeletal pain. Gastrointestinal symptoms were reported as the most serious side effects from its oral use.