Prevention of diseases: potatoes are rich in special vitamin C, vitamin E and potassium. Among them, vitamin C can obviously enhance the body's resistance to many viruses such as colds; Vitamin E can promote people's sexual desire and delay aging. Potassium can effectively prevent hypertension, stroke and cardiovascular diseases. Japanese scientists have found that potatoes contain a kind of collagen mucin that cannot be obtained from chicken, duck and fish. This substance can keep the elasticity of human arterial wall and effectively prevent atherosclerosis.

Sweet potato flowers, flowers on sweet potato vines, are mostly lavender and white, shaped like small morning glory. Stamens are flush with the flowering plane and have fragrance. It can be used as medicine or cooked with sweet potato vine as a side dish. Cymes axillary, 1 ~ 3 ~ 7 flowers cymose, peduncle 2 ~ 10.5 cm long, slightly stout, hairless or sometimes puberulent; Bracts are small, lanceolate, 2 ~ 4 mm long, with awn tips or acute tips at the top, caducous; Pedicel length 2 ~ 10 mm; Sepals oblong or elliptic, with unequal lengths. The outer sepals are 7 ~10mm long and the inner sepals are 8 ~ 1 1 mm long.

Mm, the tip suddenly becomes awny, glabrous or sparsely ciliate; Corolla pink, white, lavender or purple, bell-shaped or funnel-shaped, 3 ~ 4 cm long, glabrous outside; Stamens and styles are embedded, and filaments are hairy at the base; ovary

2-4-loculed, hairy or sometimes glabrous. Flowering habits vary with varieties and growth conditions. Some varieties are easy to bloom, others will bloom when the climate is dry, which is common in areas with high temperature and short sunshine, and rarely blooms in areas with low temperature.