Cabbage. Capitata L. is a variety of Brassica in Cruciferae. Also known as Chinese cabbage, cabbage, pimple white, cabbage, cabbage, lotus white and so on. Biennial herb covered with powdery frost. Short and stout annual stems are fleshy, unbranched, green or grayish green. Basal leaves are many, thick, layered into spheroids, oblate, with a diameter of more than 10-30 cm, milky white or light green; Originated from the Mediterranean coast, 16 raft cutting and small ancient rubbings were introduced to China. Chinese cabbage has the characteristics of cold resistance, disease resistance, strong adaptability, easy storage and transportation, high yield and good quality. Widely cultivated in China, it is one of the main vegetables in northeast, northwest and north China in spring, summer and autumn. Chinese cabbage is a biennial herb, and its roots are mainly distributed in the soil layer within 30cm. Stem shortening is divided into inner shortened stem and outer shortened stem. Cauline lotus leaf with shortened outer part and cauline bulbous leaves with shortened inner part. The leaves of cabbage include cotyledons, basal leaves, seedling leaves, lotus leaves and bulbous leaves. The leaves are dark green to green, smooth and fleshy, and there is powdery wax on the leaves, which can reduce water transpiration, so Chinese cabbage has stronger drought resistance than Chinese cabbage. Flowers are racemes, cross-pollinated, and all varieties and varieties of cabbage cross each other. The fruit is silique, the seeds are spherical, reddish brown or dark brown, and the 1000-grain weight is about 4g.