Tree 5-24 m tall. Branchlets densely ferruginous-tomentose. Leaves mostly imparipinnate, 10-65 cm long, with 2-19 leaflets, moderately to densely covered with appressed, lustrous, ferruginous to crimson hairs when immature, glabrescent; rachis prominently winged in intermediate and some adult leaves; leaflets mostly elliptic to ovate, acuminate, petiolulate, 3-18 cm long, 1.1-5.5 cm wide. Conflorescence terminal, axillary or ramiflorous, erect to spreading, with 0-6 lateral branches; rachis 3-10 cm long; flower pair bracts 0.5-1.5 mm long; peduncle 1-2.5 mm long. Tepals 7.5-12 mm long, cream, densely appressed-ferruginous-pubescent on outside. Gynoecium 6.5-10 mm long, green, glabrous. Fruit 1.5-1.9 cm long, 1.3-1.6 cm wide, blue-black.