Walnut, also known as walnut, is a tree of the walnut genus in the walnut family. The walnut tree has a broad crown, and the bark is gray green when young and gray white with shallow longitudinal cracks when old; Branchlets are hairless, glossy, covered with shield like glands, gray green, later brownish; The small leaves are elliptical ovate to elongated elliptical in shape, with blunt rounded or acute pointed tips, short gradually pointed tips, and sparse fine serrations along the entire margin or on young trees. The upper part is dark green, hairless, and the lower part is light green; The bracts, bracteoles, and carpels of male flowers are all covered with glandular hairs, and the anthers are yellow and hairless. The bracts of female flowers are covered with extremely short glandular hairs, and the stigma is light green; The fruit has a short fruiting period, with a drooping and almost spherical shape. It is hairless and has a flowering period of May and a fruiting period of October.