Small to medium-sized deciduous tree up to 18(–25) m tall; bole usually short and branchless for up to 5 m but sometimes up to 12 m, straight or twisted, up to 75 cm in diameter; bark surface grey to brown, smooth or rough and reticulate, inner bark with reddish exudate; crown flattened, umbrella-shaped; young twigs glabrous or very shortly hairy. Leaves alternate, bipinnately compound with 1–3(–4) pairs of pinnae; stipules awl-shaped, caducous; petiole 4–8 cm long, grooved above, glabrous, near the base at upper side with a sessile gland, rachis 8–14 cm long, glabrous or sparsely pubescent; leaflets in (3–)4–8(–9) pairs per pinna, almost sessile, obliquely rhombic-ovate to elliptical-oblong, up to 5(–7) cm × 2.5(–4) cm, rounded to slightly notched at apex, glabrous, distinctly glaucous below. Inflorescence an axillary head on 2–11 cm long peduncle. Flowers bisexual, regular, 5-merous, greenish yellow; pedicel up to 2 mm long; calyx 3–5.5 mm long, with long tube toothed at apex, pubescent outside; corolla 5–11 mm long, pubescent outside; stamens numerous, 1.5–3 cm long, united at base, with white filaments; ovary superior, gradually tapering into an up to 3 cm long style. Fruit an oblong, flat pod 12–23 cm × 2.5–5 cm, almost glabrous, indistinctly transversely veined, pale brown when ripe, opening with 2 papery valves, c. 8-seeded. Seeds lens-shaped, 7–9 mm in diameter. |