Deciduous tree up to 25 m tall. Young shoots tomentose. Leaves impa¬ripinnate, 17-40 cm long; leaflets 5-9, softly tomentose, opposite to sub-opposite, 7-20 cm long, 3-8 cm broad, ovate to elliptic-ovate, acute to acuminate, glab¬rescent to pubescent on nerves beneath; petiolule 2-4 mm long. Male catkins 6-12 cm long, lateral; bract c. 2 mm long; bracteoles 2, c. 3 nun long, ovate to obovate, pubescent; tepals 4, ovate, c. 2 mm long; stamens 10-20, subsessile; anthers 2 mm long, irregularly apiculate, basifixed, dehiscing longitudinally. Female flowers 1-3, terminal on short spikes; involucral tube of fused bract and bracteoles, c. 3.5 mm long, tomentose, glandular, obscurely 4-toothed and irregular at the margin; tepals 4, linear, 2.5-4 mm long, alternating with the teeth; margin sparsely pubescent; ovary c. 3.5 mm long, ovoid, inferior; style c. 2 mm long; stigmas 2, recurved, plumose to fimbriate, exserted. Drupe up to 5 cm long, ovoid to subglobose; epicarp green, glandular; endocarp 2-valved; seed 2 to 4-lobed at the base.