A shrub or treelet up to 7 m tall; young branches glabrous to puberulous. Leaves with 4—9 pairs of leaflets; petiole 1.5—5 cm long; rachis up to 15 cm long, with a clavate gland between the 2—4 lower pairs of leaflets; leaflets ovate to ovate-oblong, 3—10 cm x 1—5 cm, glabrous above, sparsely hairy and glacous below. Inflorescence an axillary raceme, 5—13 cm long, 10—20-flowered; pedicel 1—4 cm long; outer sepals 2, rounded, 3—5 mm long, inner sepals 3, up to 7 mm long; petals subequal, ovate-oblong, 2—3 cm long, yellow, claw 1—3 mm long; stamens 10 with thick filaments, one 3—4 mm, others 1—2 mm long. Pod flat, strap-shaped, 15—20 cm x 12—18 mm, glabrous, 20—35-seeded. Seed 1 cm long, black, shiny.

Purgative (flowers)

PROSEA (Plant Resources of South-East Asia) Foundation

A decoction of the roots is used against gonorrhoea. The leaves are used against dysentery.