Trees up to 10 m or more. Leaves very large, 3-pinnate, 60-180 cm long, imparipinnate, rachis stout ribbed; leaflets opposite, elliptic-ovate, 7-14 x 5-8 cm, entire, subacuminate, base oblique or rounded, nerves inconspicuous above, prominent and minutely pubescent on lower surface. Flowers not seen. Capsule elongated, 30-100 cm, compressed, brown, valves woody. Seeds discoid, with wing 35-40 x 58-60 mm; wing transparent, yellowish-white.