A large evergreen tree. Stipules linear, caducous. Leaves 3.5-15 cm long, paripinnate. Leaflets 10-20 pairs, opposite, 1.2-1.8 cm long, c. 3.7-5 mm wide, oblong, obtuse. Inflorescence 10-15 flowered lax raceme. Pedicel 8-10 mm. Calyx c. 1.2 cm long, tube turbinate, teeth lanceolate, the lowest two connate. Petals 3, 1-1.5 cm long, pale yellow, with red veins, the two lower reduced to scales. Stamens monadelphous, 3 perfect, others reduced to bristles. Pods 7.5-20 cm long, 2-2.5 cm wide, slightly compressed, indehiscent. Seeds dark brown or black.