A large liana up to 30 m long. Leaflets 5—9, oblong or oblong-obovate, 7—25 cm x 3.5—11 cm, base rounded to cordate, apex shortly acuminate or rounded, coriaceous. Inflorescence an axillary or terminal pseudopanicle, 15—50 cm long, flowers in groups of 7—8; calyx campanulate, 3—4.5 mm long, truncate, corolla violet, standard orbicular with a green basal blotch, auricles absent, callosities absent, sericeous outside, wings elliptical, adherent to the keel petals, stamens diadelphous, vexillary one free at base, joined to the tube in the middle. Pod very thick with narrowed base and top, 5—7.5 cm x 1.5—3.5 cm, densely brown hairy, glabrescent, 1—2-seeded. Seed transverse-ellipsoid, thick, 2.5—3.5 cm x 1—2.5 cm x 0.4—1.3 cm.

Vermifuge (bark powder or pounded dry leaves).

PROSEA (Plant Resources of South-East Asia) Foundation

The leaves are used for poulticing sore eyes. Pounded leaves are placed in a hollow tooth to relieve toothache. A decoction of the leaves is drunk for fever, urinary disorders and after chilbirth.