Tree, c. (4-)25 m high. Branchlets 4-10 mm, often verrucose, young parts densely pilose. Leaves 1-4-jugate. Pith of the petioles with 1-17 vascular strands. Leaflets ovate (to lanceolate), 4-22 by 2-12 cm, chartaceous, sometimes more or less bullate, above glabrous or pilose on the nerves only, beneath densely woolly pubescent on the nerves to subglabrous; base cuneate to subcordate; apex more or less abruptly, shortly and bluntly acuminate; nervation prominent beneath, nerves 7-20 pairs (angle 60-80°), curved, not arching except in the apex; intermediate veins sometimes distinctly developed. Inflorescences axillary, paniculate, with a short peduncle, sometimes with a vegetative terminal bud, densely woolly pubescent, glabrescent or glabrous, ♂ ones 7-12 cm long, rather dense and many-flowered, female ones 1-7 cm, more lax, branches always very short. Flowers usually glabrous, 1.5-2.5 mm. Calyx 0.75 mm high. Stamens free or slightly adnate to the disk. Disk cupular, truncate or irregularly undulate. Infructescences sparsely pubescent. Fruits 13-19 by 8-12 mm, ovoid, slightly pointed at the apex.
Primary forests up to 700 m. Fl. March, July, Oct.-Nov., fr. Oct.-March.