Petals 5, the upper one white, shaded green in the centre, 3.5–4.5 cm long, the expanded portion 2–2.5 × 2.5–3.8 cm, the other petals 1–1.7 cm long, ± linear.
Leaflets in 2–4 pairs, 4.5–16.5 × 2.5–7 cm, ovate to elliptic, cuneate to rounded at the base, acuminate with blunt tips at the apex, glabrous.
Inflorescences paniculate, terminal, 3–11 cm long; pedicels 1.5–3 cm long, tomentellous; bracteoles 2–3 × 1–1.4 cm, obovate, tomentellous.
Hypanthium 0.8–1.2 cm long, glabrous or nearly so.
Seeds up to 4 × 3.5 cm, elliptic, flattened.
Pods brownish, to 30 × 8 cm, oblong.
Branchlets glabrous.
Tree to 20 m tall.
Sepals 5.