Trees to 30 m tall, dioecious. Young branchlets 2.5-4.5 mm wide in third internode. Leaves 3-foliolate; petiole 2-12 cm, glabrous to tomentulose; leaflet blades elliptic, sometimes ovate-elliptic, or rarely obovate, in terminal leaflet 6-21 × 2.5-8.5 cm, glabrous or puberulent to sparsely puberulent on midvein especially abaxially and sometimes on secondary veins abaxially, apex acuminate. Inflorescences axillary, 8-32 × 3-16 cm; peduncle 4-15 cm; larger primary branches usually ascending. Pedicel 0.3-2.5 mm but 1-5 mm in fruit, nearly glabrous to tomentulose. Sepals 0.5-1 mm, connate at base or to ca. 1/4 their length, glabrous or outside puberulent, persistent in fruit. Petals 1.5-2.5 mm, deciduous or subpersistent in fruit. Stamens 4, in male flowers 2-4 mm, in female flowers 0.5-2.5 mm; filaments at least in male flowers subulate to filiform at apex. Gynoecium in female flowers 1-3 mm, in male flowers 0.2-0.5 mm; ovary nearly glabrous to shortly pubescent or ± sparsely villous. Fruit follicles ellipsoid, 4.5-5 mm, glabrous to sparsely puberulent. Seeds subglobose, ovoid, or ellipsoid, 3.5-4 mm, attachment Type B. Fr. Aug-Sep.