It is a medium sized deciduous tree, 6-12m tall, with a short-crooked trunk and dark brown, deeply cracked bark. Leaves are alternate, trifoliate, to 30cm long (including the petiole); petioles are 3.8-5cm long; stipules are 6mm long, lanceolate, acute; leaflets are broadly ovate, 7.5-15cm long and 3.8-10cm wide, coriaceous, glabrous above, sparsely pubescent beneath, base cordate, margins shallowly crenate, main nerves 4-8 pairs, petiolules are 3mm long. Flowers are white or pink, somewhat fragrant, borne in short-fascicled racemes arising from the nodes of old branches; pedicels are 1.2-2cm long, filiform; bracts c.1.3mm long, ovate, acuminate; bracteole 1 beneath the calyx, minute; calyx 4-6mm long, pubescent, teeth short, triangular; corolla 1-1.3cm long. Fruits(pods) are linear-oblong, 5-7.5cm long, light brown, flat, joints 2-3 times as long as broad, reticulately veined; seeds 2-5.