Medium sized trees 10-15 m high, canopy conical or rounded, dark green; branchlets prominently angled with wing-like ridges, smooth, dark grey on the trunk. <P>Leaves bipinnate, dark green decurrent; petiole angular, 1.5-2.5 cm long; rachis angular, 4-12 cm long with a raised gland just below the junction of each pinnae pair; pinnae 5-15 pairs; pinnules 15-35 pairs which are well separated from each other, linear, 5-14 mm long, 0.5-0.75 mm broad, usually glabrous. <P>Inflorescences racemose or panicled; flower-heads globular, bright yellow, 25-30-flowered; peduncles glabrous or with a few scattered hairs, 3-6 mm long; flowers 5-merous. <P>Legumes linear, 4-10 cm long, 5-6 mm broad, straight or slightly curved, raised over seeds, dark brown, glabrous, margins slightly constricted between seeds. Seeds longitudinal in legume, ellipsoid; funicle short, expanded into a small aril.