kohlrabi, also known as "bulb cabbage". Cruciferae. Biennial herb. The petiole is slender, the leaves are oval, and there are wavy notches or lobes. The stems swell into oblate spheres and are fleshy. There are many cultivated plants in northern China. Bulbs can be eaten fresh or pickled. Seeds can be pressed for oil for food. Pan Rongbi's Pickled Vegetables at the Age of Emperor Jing in Qing Dynasty: "Pickled vegetables after first frost, except melon eggplant, celery mustard, radish, broken blue, dried arrow and not old in spring, have white leeks, which are called yellow sprouts. They are the best in Dumen, and they are delicious without losing Fuyang winter bamboo shoots. "

biennial herb, 3-6 cm high, all hairless, with frost. The stem is short, and it expands into a solid oblong sphere or oblate sphere 2-4 cm above the ground, which is green and has leaves on it. Basal leaves are slightly thicker, ovate to oblong in width, 13.5-2cm long, with one lobe on each side at the base, or only one lobe on one side, with irregular teeth on the edge, petiole 6.5-2cm long and often a few lobules; Cauline leaves are oblong to linear oblong, about 2.5 cm long, with irregular serrated edges and 1-2 lobes at the base. The flowers are yellow. Silique has a short beak and often swells at the base; Seeds nearly spherical, 1.2 mm in diameter, angular. Flowering in April and fruiting in June.