Tree 7-12 m high, 12-40 cm dbh. Twigs pilose, the hairs up to 0.8 mm long, older ones more sparsely pilose to glabrescent or puberulous. Leaves imparipinnate with (2-) 5-7(-8) pairs of lateral leaflets; total length up to 14 cm including a petiole 1.3-2.5 cm long; rachis segments 0.6-1.5 cm long; petiole and rachis segments semiterete, pilose and/or puberulent; leaflets chartaceous to subcoriaceous, glabrous above, sparsely pilose beneath; lateral leaflets narrowly elliptic, the largest per leaf 2-6.5 by 0.6-1.4 cm, base unequal, ± sessile, apex narrowly acute; apical leaflet narrowly elliptic, (2.2-)4.1-8.3 by (0.7-)0.9-2.3 cm, base shortly attenuate to petiolulate, apex narrowly acute; margin crenate to serrate, 7-11 notches on each side of the largest lateral leaflets; midrib slightly depressed above, puberulent at base, prominent beneath and pilose. Stipules suborbicular or reniform, up to 1.2 by 1.9 cm, the margin wavy or coarsely toothed. Inflorescence of 1-3 pairs of dyads, sometimes a few sequential nodes flowering simultaneously; peduncles 0.4-1.5 cm long, puberulous; axes of racemes up to 12 cm long, densely puberulous. Flowers unisexual and plants dioecious; pedicel 0.8-1.5 mm long, puberulous; calyx lobes 0.5-0.7 by 0.4-0.5 mm, hirsute on outer surface; corolla obovate or almost circular, 1-1.3 by 0.7-0.9 mm, rounded at apex; disc lobes 0.2-0.3 mm long, broadly oblong; in male flowers: filaments 2.8-3 mm long, ovary 0.4 mm long, pubescent, styles 0.1 mm long, incurved; in female flowers: filaments c. 0.9 mm long, ovary c. 1 mm long, densely pubescent, styles c. 0.9 mm long, straight, stigmas papillose. Capsule with valves 2-2.5 by 1.4-2 mm at dehiscence; exocarp pubescent; calyx lobes often caducous. Seeds c. 0.6 mm long, comose at both ends.
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