Trees, up to 12 meters in height, dark brown ovoid in winter buds, twigs grayish brown glabrous or yellow-bearded, with lenticels. Odd-pinnate compound leaves, opposite, with petioles 15-20 cm long. The middle leaf shaft has grooves and glabrous, or there are rusty tufts between small petioles. The leaves are usually 7 or 7-9 pieces, nearly leathery, elliptical or elliptical-ovate, 3.5-10 cm long and 1.7-5 cm wide, with acuminate or obtuse apex. The base is broad and wedge-shaped, with irregular jagged or wavy edges. The surface is light green and glabrous, the back is glabrous or pubescent along the veins, the midrib is concave on the surface and the back is convex, the lateral veins are not obvious on the surface, and the back is slightly convex, sessile or short stalked. The panicle grows laterally or terminally on the branches of the year, 10-15 cm long and loose. The total pedicel is glabrous, the pedicel is slender and about 5 mm long, and the calyx is irregularly divided into a bell shape and no petals. The stamens have 2 anthers, ovate or oblong-ovate, shorter than the filaments, and the style has a club-like stigma. Two-lobed samara, oblanceolate 2.8-3.5 cm long, 4-5 mm thick, apex obtuse or slightly concave, with 1 seed, flowering in April and fruiting in August to September.
Deciduous tree crown oval bark yellowish brown branchlets smooth glabrous odd-numbered pinnate compound leaf opposite leaflets 5-9 usually 7 oval or ovate-lanceolate long 3--10 cm apex acuminate base narrow Symmetrical margins with teeth and wavy teeth. The surface is glabrous. On the back, there are pubescent panicles along the veins. It grows or is terminal. Large and loose elliptic inflorescences. Terminal and lateral drooping. Summer flowers. Calyx. Needle-shaped 3--4 cm long. Flowering period 3--5 month. Fruits mature in October. Samaras are flat-lanceolate.
