The sun flower plate is small and the flower color is various. In addition to the common yellow, there are purple, red, orange and other colors. The height of the whole plant is about 30 cm, and the area of its petals occupying the whole plate is larger than that of the seeds. But the color of sunflower is only yellow, the height of plant is one meter five to three meters, and the whole seed tray occupies two thirds of the area of flower tray. From these appearances, they are totally different plants.
The seeds of sunflower are very small, and some varieties have no seeds, so its seeds cannot be eaten directly. Sunflower seeds are the "seeds" we often eat. The seeds are much larger than the sunflower seeds, and can be eaten directly. The sunflower seed oil on the market is extracted from its seeds.
In addition to the ornamental effect, sunflower also has pharmacological effect. The whole plant of Portulaca grandiflora can be used as medicine, which has the effect of clearing away heat and swelling. It can be used to treat scald, injury caused by falling and bruise. Portulaca hairy can be used to treat knife injury. The ancients just mashed it and applied it directly to the wound to stop bleeding. The main function of sunflower is to reduce blood pressure and fat, strengthen stomach and diuresis.
Sunflower blooms in June and July every year, and its flowering period is relatively short. Sunflower can bloom in summer and winter, and it grows rapidly in the growth period. It will bloom and bear fruit in more than two months, and the flower will bloom for about half a month.
