Canna is the flower of Canna, a perennial herb of Cannaceae. The whole plant is green and hairless, covered with wax white powder, with thick roots and branches on the ground; Simple leaves alternate, large leaves, sheathed petiole, longer lower leaves, oval, sharp apex, wide wedge-shaped to round base, entire or microwave-shaped; Racemes, flowers solitary or paired, each with 1 bracts, 3 sepals, green and white or reddish at the apex, corolla usually red, lip entire; Capsule ovoid oblong. Flowers bloom in June. It is cultivated in most parts of the country. Flowers are harvested at flowering stage, dried or used fresh, and their roots and leaves are also used as medicine.

What does canna do? Canna flowers are bitter and cold. Has astringent, hemostatic and detoxicating effects. Treat traumatic hemorrhage, metrorrhagia and carbuncle. Rhizomes clear away heat and toxic materials, promote blood circulation and stop bleeding. Examples of the functions of canna are as follows:

1. Traumatic bleeding: Take appropriate amount of Canna flower, bake and grind it into powder, and apply it to the affected area.

2. Burst: Canna flower or root 15g, Celosia cristata 15g, decocted in water and mixed with sugar. Or use canna flower 9 ~ 15g, decoct in water or grind into powder, and take it with yellow wine.

3. Carbuncle swelling: appropriate amount of fresh canna flowers or leaves, washed and mashed, and externally applied to the affected area.

4. Jaundice: fresh canna root 60 ~ 120g, decocted in water 1 time, taken in the morning and evening, and taken continuously for 20 days 1 course of treatment. Suitable for acute icteric hepatitis.

5. Take it off: Canna flower 10g, Coix seed 30g, decocted in water.

Legend has it that Canna was once a fairy in the sky and wanted to be as good as a girl on earth. When she saw the happy scene of green mountains and green waters, men plowing and women weaving, she could not bear to walk through lonely days in the sky, so she turned into this flower and left her beauty in the world forever.