Description: A large, deciduous tree (up to 30 m high and 2 m dbh), trunks usually fluted and buttressed, crowns large and arching or drooping in mature trees. Leaves compound pinnate with 6–12 sub-opposite to alternate leaflets which are elliptic-lanceolate to obovate, 2.5–7 cm long and 2–4.5 cm wide. Leaflet margins entire. Flowers orange-yellow, fragrant and borne in large axillary panicles. Fruits are large, 8–12 cm diameter, disc-shaped, indehiscent pods, green when immature and light brown when mature and winged; slightly bulging central part 2–5 cm across, bearing 1–3 seeds, very hard pericarp. Pods of prickly narra are covered with dense bristles about 1 cm long. Seeds asymmetrical, 10–12 mm long, 7–8 mm wide, 4–5 mm thick and pointed at the micropylar end. Red-brown seed coat very hard with large cotyledons and no endosperm.