Medium sized, deciduous tree, about 5-7 m tall, with hooked spines; brown bark, splitting irregularly, red inside; leaves bipinnate, 5-6 cm long, rachis about 10 cm long, pubescent with a large gland at the base of petiole, 20-40 pairs of pinnae, leaflets 30-50 pairs, ligulate, small, stipular thorns short, hooked in pairs; flower white to yellow in axillary, pedunculate spikes, 5-10 cm long, pinnae 40-80 pairs, pinnules 30-50 pairs, small, ligulate, linear oblong, base cordate, margin entire, apex sub-acute; peduncle 2-3 cm long; flower small, actinomorphic, bisexual, tetra or pentamerous; calyx 4 toothed, campanulate, hairy, teeth deltoid; corolla lobes 4, 2-3 times longer than sepals, ovate-oblong, sub-acute, clothed with distinct, spreading, grey hairs; stamens many, free, filaments slender, anthers minute; ovary sessile, glabrous, style filiform; pods flat, narrow, strap shaped, smooth or glabrescent, dark brown, dehiscent; seeds-5 to 15, compressed.