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Leaves paripinnate; stipules not seen, very early caducous; petiole 1.6–2 cm long, sparsely pubescent; rachis 9–14(18) cm long,>i> sparsely pubescent; petiolules 1–3 mm long;>i> leaflets opposite to subopposite, in 7–9 pairs,>i> discolorous, 2.8–6.2 × 1.5–2.8 cm, ovate to ovate-elliptic,>i> symmetrical,>i> apex rounded or (usually) retuse, base rounded to broadly cuneate, glabrous;>i> venation slightly prominent on both surfaces.
Stamens 10; 3 with filaments c.40 mm long, glabrous, sigmoidally curved near the base, without a median swelling, anthers c.5 mm long; 4 with straight filaments 10–15 mm long, anthers 5 mm long; 3 with filaments 12–15 mm long, curved towards the apex, anthers 3 mm long.
Inflorescences axillary and terminal, racemose; axis puberulous; bracts and bracteoles not seen, presumably early caducous; pedicels (2.5)5–8 cm long, longitudinally ridged when dry, sparsely pubescent.
Ovary multiovulate, c.50 mm long and 2 mm in diameter, flattened-filiform, almost glabrous but very sparsely pubescent near the base; stigma terminal, recessed.
Branchlets very dark brown to almost black, longitudinally furrowed, pubescent to sparsely pubescent, glabrescent.
Calyx lobes 5, 12–15 × 5–8 mm, ovate to elliptic, sparsely puberulous near the base outside, glabrous inside.
Seeds buff, shiny, 8–9 × 5–6 × 4–5 mm, ellipsoidal, somewhat flattened, not embedded in pulp.
Pod black, up to 70 cm long, 1.5–2 cm in diameter, terete, glabrous, many-seeded.
Petals yellow, 28–30 × 16–27 mm, broadly elliptic.
Tree to 20 m tall; bark smooth, grey.
