Unarmed tree, crown conical or rounded young parts covered with silky tomentum. Leaf paripinnately decompound. Rachis c. 4-12 cm long with numerous raised glands. Pinnae 8-21 pairs, leaflets 16-70 pairs, c. 1.5-4 mm long, 1 mm broad. Inflorescence panicle of heads. Fruit c: 3-10 cm long, c. 5-8 mm broad, dark in colour, densely covered with tomentum.