A medium sized tree. It grows up to 15 m tall. The bark is grey and smooth in young trees and rough and brown in old trees. The leaves are divided twice with 3-4 pairs of side branches which carry 11-14 pairs of leaflets. The leaflets are 2.5-5 cm long. The underneath is hairy. The bases have unequal sides and become narrow. They are carried on short stalks. They turn yellow in autumn. The flowers occur in short dense groups about 2.5 cm long. They are greenish-yellow with a reddish tinge. The pods are 8-20 cm long and about 4 cm wide. They are hard and flat and burst open. There are 6 hard brown seeds inside. The seeds are edible.