Deciduous tree, 10-20 meters high; bark is gray, rough and wrinkled. The apical buds are conical, pointed and covered with brown chaff-like hairs.
Branchlets are reddish brown, cylindrical, yellow pilose or bald, old branches are reddish brown, smooth and glabrous. The pinnate compound leaf is 18~44 cm long; the petiole is 2~5 cm long, and the base is barely enlarged; the leaf shaft is cylindrical, with a wide shallow groove on the upper face, densely covered with gray-yellow pilose (varietals and some cultivated types are often glabrous ); lobules 79, thin leathery, oblong-lanceolate, narrowly oval or elliptical, 4~13 cm long, 2~8 cm wide, terminal lobules and lateral lobules about the same size, apex acuminate or Acutely pointed, broad-wedge-shaped at the base, with obtusely serrated or nearly entire leaf margins, yellow-green on the top, glabrous, light green on the bottom, sparsely serous, dense on the veins, midvein concave on the top, lateral veins 7~ 9 pairs, with thin veins bulging below; leaflets sessile or 1 pair of leaflets with short stalk below.
Panicles born on last year’s branches, 5-20 cm long; dense flowers, male and bisexual flowers divergent, open at the same time as leaves; peduncle short; peduncle slender and pubescent; male flower has small calyx and irregularly deep calyx teeth Split, large anthers, oblong, short filaments; bisexual flowers have wide calyx, calyx teeth lobed, style thin, stigma 2-lobed. Samaras are narrowly oblanceolate, 3~5(7) cm long, 0.4~0.7(1.2) cm wide, the upper and middle part is the widest, the apex is blunt or has a short pointed head, the wings extend down to the middle of the nut, and the nut is cylindrical , 1.5~2 cm long and 2 mm wide, with obvious veins. Flowering in April, fruiting period from August to October.
