Jiangnan star fern, also known as the seven-star sword, is known as the "king of all-round detoxification" on the Internet, and the price is as high as thousands of pounds. The whole herb can be used as medicine, clearing away heat and toxic materials, promoting diuresis and eliminating dampness, expelling wind and removing dampness, cooling blood and stopping bleeding, and relieving swelling and pain.
Star fern in the south of the Yangtze River is an epiphyte of the genus Star fern in Polypodiaceae, with a plant height of 30- 100 cm. Rhizomes are long and transverse, with scales at the top. The scales are brown. Other names: Domino Grass, Seven Stars Sword, Cocktail.