Tree, 25-40 m by 40-70 cm, buttressed. Branchlets 7-9 mm thick, verrucose, young parts densely ferrugineously woolly-tomentose to glabrous, as are the petioles, and the lower surface of the leaflets; pith with rather many, small and dispersed or more or less peripherally arranged vascular strands; terminal bud c. 0.5 cm long. Leaves 2-4(-5)-jugate. Petioles 5-8 cm, up to 11 cm, not or hardly flattened at the base. Leaflets ovate to oblong, 5.5-14.5 by 3-5 cm, (glabrous or) tomentose underneath; base rounded (to cuneate); apex gradually long-acuminate; nervation prominent underneath, nerves 9-15 pairs (angle c. 70°), curved, not distinctly arching. Panicles (female unknown) axillary, 5-23 cm, tomentose, long-stalked, branches up to 9 cm long. Male Flowers 3-4 mm long, tomentose. ♀ Flowers: calyx outside densely rusty stellate-pubescent, inside densely minutely appressed-hairy. Corolla as in ♂ flowers. Disk annular, low, fleshy. Calyx 1½-2½ mm high, segments nearly free. Petals sericeous tomentose at both sides. Filaments adnate to the disk. Disk cupular with undulate rim. Pistil in ♂ flowers strongly reduced. Infructescences 9-19 cm long, lenticellate, shortly tomentose. Fruits subglobose, 15-18 by 12-14 mm, stigma 90° or more excentric.
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