Leaves 5–10 cm long; petioles (15)20–45 mm long; rachis deeply canaliculate above, with raised and winged margins; leaflets in 2–4 widely spaced pairs, 2–3 times longer than broad, increasing in size distally, glabrous or sparsely pubescent, the proximal leaflet pairs 3.5–8 × 1.5–4 cm, the middle ones 5–8.5 × 2–3.5 cm, the distal ones 6–10 × 2.5–4.5 cm, ovate, elliptic or lanceolate, often falcate, acuminate, acute, obtuse or emarginate at the apex, obliquely cuneate at the base, midvein central or subcentral, 2–3 secondary veins from the proximal leaflet base.
Flowers up to 5 × 4 mm, pubescent; pedicels up to 2 mm long; bracteoles 4–7 × 3–5 mm, obovate or circular, pubescent.
Stipules caducous, free, erect, 8–30 × 1.8–12 mm, linear, lanceolate or falcate; auricles absent.
Pods 6–15 × 2–4 cm, oblong to obovate, rounded at the apex, ventral fringes suberect or revolute.
Inflorescences in terminal and/or axillary panicles to 6 cm long; bracts up to 3 × 3 mm, ovate.
Sepals 5, 2–3 × 1–1.5 mm, ovate or oblong, imbricate or valvate, ciliate on the margins.
Ovary 2–3 × 1.5 mm, densely pubescent, up to 7-ovulate; style up to 8 mm long.
Tree to 20 m tall; bark smooth, flaking in large thin irregular scales.
Stamens 10, shortly united at the base, filaments 5–10 mm long.
Petals 1–4, up to 2 × 1 mm, filiform or linear.
Young branchlets puberulous or glabrous.
Dormant axillary buds globose.
Seeds not seen.