Saposhnikovia divaricata, also known as copper cloud and screen, is the root of Saposhnikovia divaricata in Umbelliferae. It was first published in Shennong Materia Medica Classic and was listed as the top grade. Saposhnikovia divaricata is mainly produced in the northeast of China and the east of Inner Mongolia, which is called "Guanfangfeng". The quality is the best, and it is listed as authentic. Saposhnikovia divaricata is also the root of mugwort, which belongs to the same family. It can also be used as a habit and medicine. In addition, the dry roots of the same family plant Eiko are also used to hold windproof, so attention should be paid to identification when using them.

Authentic Fangfeng

The appearance is long cylindrical or long conical, slightly curved, about 15 ~ 30 cm long and about 0.5 ~ 2 cm in diameter. The surface is grayish brown and rough, with many transverse lenticels, longitudinal wrinkles and punctate root marks. There are dense ring patterns on the root head, commonly known as "earthworm head", and brown "brush-like" leaf sheath residues remain on the ring patterns. Light weight, brittle and easily broken, uneven section, light brown peel, loose crack, yellowish xylem with radial texture, commonly known as "phoenix eye socket"; It smells a special smell and tastes slightly sweet.

Fake dog eiko

The dried roots are cylindrical and slightly curved, about 6 ~ 9 cm long and 0.5 ~ 1 cm in diameter. The surface is grayish brown, the skin is easy to fall off, and there are many verrucous protrusions and horizontal rings. Brittle and easily broken, but the cross section is flat and the skin is often separated from the skin. The skin of the cross section is light brown and the wood is yellow. The smell is slight, and there is no special smell of the real thing. It tastes spicy and cold.

Modern pharmacological studies have confirmed that Fangfeng decoction has obvious antipyretic effect; Ethanol extract can obviously increase the pain threshold and has good analgesic effect; The fresh extract of Saposhnikovia divaricata has certain antibacterial effect on Pseudomonas aeruginosa and Staphylococcus aureus, while Eiko pseudo-dog belongs to the same family as Saposhnikovia divaricata, but it does not have various functions of Saposhnikovia divaricata and cannot be used instead of Saposhnikovia divaricata.