Changes

*Medium-sized to large monoecious tree up to 40(–60) m tall; bole usually straight and cylindrical, branchless for up to 18(–25) m, up to 150(–200) cm in diameter, often with broad and plank-like buttresses up to 5 m high; outer bark of older trees scaly, shaggy, deeply longitudinally furrowed and brownish grey to reddish brown, inner bark red-brown or pinkish red; crown dome-shaped, consisting of a few large, ascending branches. *Leaves alternate, paripinnate with (2–)3–6(–8) pairs of leaflets; stipules absent; leaflets opposite, ovate-elliptical, 8–18 cm × 3–5.5 cm, entire, glabrous, pinnately veined. *Inflorescence an axillary panicle 10–20 cm long, consisting of small cymes. *Flowers unisexual, but with well-developed vestiges of the opposite sex, regular, 5-merous, small; pedicel slender, 1.5–2.5 mm long; calyx with broadly rounded lobes 1–1.5 mm long, hairy at margins; petals free, slightly contorted in bud, ovate-oblong, 5–6 mm long, hairy at margins; stamens united into a tube, with 10 sessile anthers at the mouth of the tube; disk annular; ovary superior, usually 5-celled, style short, with disk-shaped stigma. *Fruit a woody, elongate-ovoid capsule 10–15(–22) cm long, greyish brown, opening by 5 valves, many-seeded. *Seeds with large wing, flat, 7.5–10 cm long, dark brown, hanging down and overlapping in fruit; cotyledons thin. *Seedling with hypogeal germination; first 3 leaves simple, later ones 3-foliolate or imparipinnate.

{{right|(E. Uetimane, H. Beeckman & P.E. Gasson)}}