A moderate-sized tree with yellowish bark, young branches velvety pubescent. Spines stipular, in pairs, straight, 3-25 mm, or absent. Rachis 2.5-10 cm long, usually with glands between the lowest and uppermost 2-3 pairs of pinnae.

Pinnae 3-15 pairs, c. 1.3-3.8 cm long; leaflet 6-30 pairs, sessile, 2.5-8 mm long, 1-2 mm broad, linear-oblong, glabrous or nearly so, obtuse, base oblique. Inflorescence pedunculate heads arranged in large terminal tomentose panicles, lower branches axillary; peduncle 7-10 mm long, tomentose, bracts whorled and fused basally, about or below the middle of the peduncle, c. 1.5 mm long.

Calyx c. 1.2 mm long, campanulate, villous. Corolla c. 2.5 mm long, hairy outside. Pod 10-15 cm long, 7-10 mm broad, flat, sessile, brown velvety when young, semi-dehiscent. Seeds 10-20.