Medium-sized deciduous tree up to 30(–35) m tall; bole straight and cylindrical or low-branched, up to 70 cm in diameter; bark surface grey or brown, smooth or rough; crown flattened or rounded, often umbrella-shaped; young twigs brown pubescent. Leaves alternate, bipinnately compound with (1–)2–7(–11) pairs of pinnae; stipules awl-shaped, caducous; petiole near the base of upper side with a sessile gland, rachis densely to sparsely pubescent; leaflets in 6–21(–23) pairs per pinna, almost sessile, obliquely rhombic or oblong, up to 2(–3) cm × 1(–1.5) cm, rounded to acute at apex, pubescent below. Inflorescence an axillary head on 2.5–5 cm long peduncle. Flowers bisexual, regular, 5-merous, white or pale yellow; pedicel 1–6 mm long, brown pubescent; calyx 1.5–2.5 mm long, with long tube toothed at apex, brown or sometimes grey pubescent outside; corolla 3–7.5 mm long, brown or sometimes grey pubescent outside; stamens numerous, 7–12 mm long, united at base, with creamy white filaments; ovary superior, gradually tapering into slender style. Fruit an oblong, flat pod 15–34 cm × 2–6 cm, with 1.5–2 cm long stipe, shortly pubescent, transversely veined, dull brown when ripe, tardily dehiscent or indehiscent, c. 8-seeded. Seeds flattened globose to ellipsoid, 9–11 mm × 6.5–8 mm. Seedling with epigeal germination. |