Liane, mostly glabrous. Pinnae 2-jugate. Leaflets 3–4 (–5)-jugate, oval and oblanceolate, ± equilateral basally; petiolules puberulous; lamina narrowed with an obtuse tip, 3–7.5 cm long, 1.5–3 cm wide, retuse to emarginate; surfaces ± concolorous. Inflorescence axillary spikes, 8–22 cm long; peduncle 2–8 cm long, flowering axis with scattered, long, straight hairs; bracteoles subulate, 0.8–1.5 mm long, persistent. Flowers sessile, yellow, glabrous; calyx broadly cupular, 0.6–1 mm long; petals 2.5–3 mm long. Pod compressed, straight to slightly curved, to 2 m long and 7–15 cm wide, woody throughout. Seeds compressed, circular to oblong, 3.8–4.5 cm diam., 1.5–1.7 cm thick, chestnut brown.