Deciduous tree, 25 meters high, 1 meter diameter at breast height, the upper main trunk of the trunk is inconspicuous, with many branches, the crown is umbrella-shaped; the bark is gray and smooth; the branches of one to three years old are drooping without curling or twisting. Grows into shrubs in dry and barren land; young trees have smooth bark, gray-brown or light gray, large trees have dark gray, irregularly deeply split, rough; light yellow-gray, light brown gray or gray, light brown Yellow or yellow, with loose skin holes, no enlarged cork layer and raised cork wings; winter buds are nearly spherical or ovoid, the back of the bud scales are glabrous, and the edges of the inner bud scales are white pilose.
The leaves are oval-ovate, long-ovate, elliptic-lanceolate or ovate-lanceolate, 2-8 cm long, 1.2-3.5 cm wide, apex acuminate or long acuminate, base deviated or nearly symmetrical, one The side is wedge-shaped to round, the other side is round to semi-heart-shaped, the leaf surface is smooth and glabrous, the back of the leaf is pubescent when young, later becomes glabrous or part of the vein axillary has tufted hairs, with heavy serration or single serration on the edge The veins are 9-16 on each side, and the petiole is 4-10 mm long, usually with pubescent hairs only.
