Cold potato (scientific name: Pachyrhizus erosus) is a herbaceous vine of Leguminosae. Thick, twining, slightly hairy, sometimes slightly woody at the base. The raceme is 15-30 cm long, with 3-5 flowers per node; Bracteoles setose, caducous; Calyx is 9- 1 1 mm long, and is closely covered with long bristles; Corolla light purple or reddish, flag disc nearly round; 8- 10 seeds per pod, nearly square; Root block, spindle-shaped or oblate, generally about 20-30 cm in diameter, fleshy. Take its underground root tuber for raw food or vegetable food. The seed is highly toxic and should not be eaten, but it can be used as an insecticide to control aphids. Originated in tropical America, it is now widely distributed in tropical areas of the Old Hemisphere and commonly cultivated in southwestern provinces of China.

Suitable for people who suffer from summer heat, vexation and thirst, cold and fever, headache, polydipsia, dysentery, hypertension, dizziness and red eyes, flushing on face and constipation, and those who drink too much, are thirsty and suffer from chronic alcoholism. If you want to treat chronic alcoholism, you can mix sweet potatoes with white sugar.

Avoid eating potato, which is cold, cold, diarrhea, spleen and stomach deficiency, thin stool and diabetic patients are not suitable for eating; Cold dysmenorrhea and women's menstrual period are also not suitable for consumption; Avoid eating cold potato and its seeds and leaves.

Cold potato is rich in nutrition and contains many elements necessary for human body, such as calcium, iron, zinc, copper and phosphorus. It also lowers.

Blood pressure, blood lipid and other effects. Like sweet potato, cold potato is also a high-yield crop, and the yield per mu can reach several thousand kilograms or even more than ten thousand kilograms. Therefore, in southern China, cold potato is planted as a major cash crop in some places.