Nicknames: pepper grass, emerald pepper grass, green jasper, douban ruyi.
Piper of Piperaceae.
Distribution: West Indies, Panama, North America and South America.
Watercress green is a small perennial herb with a plant height of 15-20cm. There is no main stem. The leaves are clustered, nearly fleshy, obovate, gray-green mixed with dark green veins. Spikes, light gray and white. Generally used as a potted plant for decoration, it is popular because of its bright luster and natural green color. In addition, this plant can also be used as medicine. According to the theory of traditional Chinese medicine, it can dispel wind and remove dampness, relieve cough and resolve phlegm. External use can treat traumatic injuries and fractures, so it is also an important part of Chinese herbal medicine.