Echinacea, formerly known as thistle, is a perennial herb of the Asteraceae family. It is found all over China. It is commonly found in fields, fields, ditches, and wetlands. It is a wild grass everywhere. Su Song said: "Small thistles are found everywhere, and are commonly known as (green thistles). The roots of 2 to 3 inches are very delicious for cooking." The leaves of thistle are pinnate and deeply lobed, with sharp spines on the edges. The roots are fat and the flowers are purple-red. The color is the same as thistle. Thistle and thistle are plants of the same family and different genera, with similar properties and are both used for medicinal purposes. Nature and flavor: sweet, cool, non-toxic. Ingredients: Thistle contains volatile oil, alkaloids, resins, inulin, and cyanogenic glycosides. The whole herb of thistle contains alkaloids and saponins. Pharmacology: The water extract, ethanol-water extract and ethanol extract of thistle have been tested on anesthetized animals such as dogs, cats and rabbits, and have proven to have a blood pressure lowering effect. The same test as above for thistle has proven that it has a more significant and lasting blood pressure lowering effect. Function: Both large and small thistles can clear away heat, detoxify, reduce inflammation, stop bleeding, restore liver function, and promote liver cell regeneration. They are suitable for acute febrile inflammatory bleeding, jaundice, hepatitis, hot stranguria, hematuria, etc. "Dietotherapeutic Materia Medica" states that "cook vegetables to remove wind and heat." Plant form: Perennial herb, 25-50cm tall, with creeping rhizomes. The stems are upright with longitudinal grooves, and the young stems are covered with white spider-like hairs. The leaves are alternate, oval or oblong-lanceolate, 7 to 10 cm long, 1.5 to 2.5 cm wide, with blunt apex, toothed edges, needles of unequal length, and both sides covered with spider-like wool. The inflorescence is terminal, dioecious; the involucre is bell-shaped, with 5-6 layers of involucres. The male inflorescence is 1.8cm long, and the female inflorescence is about 2.3cm long; the flowers are tubular, lavender, and the male flower corolla is 1.7 cm long. ~2cm, the female corolla is about 2.6cm long. Achenes are oval or long ovate, with longitudinal ribs and feathery crowns. The flowering period is from May to June, and the fruiting period is from May to July. Harvested in summer and autumn, washed and dried or used fresh.