A tree up to 15 m tall, young shoots pubescent. Leaves exstipulate, alternate, 15-45 cm long, imparipinnately compound with 5-10 pairs of leaflets; leaflets opposite, subsessile, up to 10 cm long, 4 cm broad, oblong-lanceolate, crenate, oblique, acuminate, usually tomentose, at least when young. Flowers in much branched panicles crowded towards the end of the shoots, bisexual or unisexual, shortly pedicellate, yellow, tomentose. Bracts deciduous. Calyx campanulate, 5-toothed valvate, tomentose outside, c.6 mm long with narrow ovate teeth. Petals 5, inserted on the hypanthium beneath the margin of the disc, valvate, tomentose outside, linear-oblong, c.8 mm long. Disc crenate, thin, lining the tube of the calyx. Filaments dilated at the base, slightly hairy, anthers dorsifixed. Ovary ovoid, hairy; style hairy. Fruit l.2-1.8 cm in diameter, black with generally 2 pyrenes. Seed with a membranous covering.