Leaves 7–18 cm long; petioles 20–70 mm long; rachis shallowly canaliculate above, margins neither raised not winged; leaflets in 2–5 widely spaced pairs, increasing in size distally, 2–3 times longer than broad, glabrous, proximal leaflet pairs 4–10 × 1.5–4 cm, distal ones 6–12.5 × 2.5–5 cm, ovate, oblong, lanceolate, elliptic or falcate, acuminate, acute or retuse at the apex, obliquely cuneate or truncate at the base, midvein central, (3)4–5(6) secondary veins from the proximal leaflet base.
Tree to 12 m tall; bark shallowly fissured longitudinally or coarsely reticulate, flaking in thick rectangular scales, dark grey.
Inflorescences in terminal and/or axillary panicles to 8 cm long, often on the old wood; bracts up to 3 × 3 mm, ovate.
Flowers up to 4–5 × 3–3.5 mm; pedicels up to 2.5 mm long; bracteoles 5–6 × 3–4 mm, obovate or circular.
Stipules early caducous, 10–30 × 1–8 mm, lanceolate, subfoliaceous, free; auricles absent.
Sepals 5, 2–3 × 1–2 mm, ovate to triangular, imbricate, sparsely ciliate on the margins.
Pods 8–14 × 2.5–4.5 mm, oblong to obovate, deep brown, with suberect ventral flanges.
Stamens 10, united to 1–2 mm at the base; filaments 8–10 mm long.
Ovary 2.5–3 × 1–2 mm, densely pubescent, up to 7-ovulate.
Seeds up to 8, 10–20 × 10–15 mm, oblong or circular.
Petals 1–2, up to 2 × 1 mm, filiform or linear.
Dormant axillary buds ovoid or globose.
Young branchlets pubescent or glabrous.