Deciduous trees, up to 20 meters high. The bark is yellowish brown or grayish brown. Branchlets are cylindrical, glabrous, green in that year, and perennial plants are yellow-brown. Winter buds are small, with 2 scales and arranged like tweezers. Pinnate compound leaves, length10-25cm, 3-7 leaflets (9 sparse); Leaflets are papery, ovate or elliptic-lanceolate, 8 8- 10/0cm long, 2-4cm wide, tapering at the apex, obtuse or broadly wedge-shaped at the base, with 3-5 coarse serrations at the edge, 3-4cm long at the middle leaflet petiole, 3-5mm long at the side leaflet petiole, dark green at the top and light green at the bottom, except. The main vein and 5-7 pairs of lateral veins protrude below; Petiole is 5-7 cm long, sparsely pilose when tender, and glabrous after neat. The inflorescence of male flowers is umbrella-shaped, and that of female flowers is racemose, all of which are born from leafless branchlets and often droop. Pedicel is about 1.5-3 cm long, flowers are small yellow-green, open in front of leaves, dioecious, without petals and disk, stamens are 4-6, filaments are long, and ovary is hairless.

Nutlets convex, nearly oblong or oblong-ovate, glabrous; Wings are 8 8- 10/0mm wide, slightly bent inward, and 3-3.5cm long together with nutlets, with Zhang Kaicheng acute angle or nearly right angle. The flowering period is April-May, and the fruiting period is September.