Large, evergreen, forest tree, 2.5-21.5 m high; producing a blood-red exudate when slashed. Leaves imparipinnate, 0.1-0.3 m long. Leaflets subopposite, 3 or 4 pairs, lanceolate to narrowly obovate, dark green, veins dark brown below, lateral veins looping to margin, apex acuminate. Inflorescences terminal panicles, only with lax, lateral branchlets. Flowers 15-18 mm long, pinkish red to purple. Calyx fulvous-sericeous. Flowering time Dec., Jan. Pod up to 120 mm long, light-brown, velvety.