This mid-sized tree grows 4 to 20 m tall and has twigs covered in fine, short brown hair. The leaves are pinnate, with 5 or 6 pairs of leaflets, and 8 to 25 cm long. The fragrant white flowers grow in spikes 6 to 8 cm long. The fruit is a cylindrical pod 15 to 40 cm and sometimes even more than 1 m long. It is olive green with characteristic long ribs.