Deciduous or semi-evergreen tree with dense dome-shaped crown. Leaves bipinnate with 4-14 pairs of pinnae, each with 9-20 pairs of leaflets. Flowers c. 3.5 cm long in large terminal pyramidal clusters, bright yellow. Fruits 6-12 cm long, flattened with narrow papery wings along the edges, ripening purple-brown with 1-5 pale brown seeds.