Identification & Quality Standard
Rhizoma Cyperi
Botanical Origin
The dried rhizome Cyperus rotundus L.(Cyperaceae)
Production Regions
Primarily produced in the Chinese provinces of Hunan, Zhejiang, Shandong.
Quality Requirements
Superior medicinal material is large, firm, aromatic, and removed all the hairs.
Macroscopic Features
Fusiform, or slightly curve, 2~3.5cm long, 0.5~1cm diameter. Externally brown or black-brown, with irregular longitudinal wrinkles, and 6~10 obvious slightly raised ringed-joints, internode length is 2~6mm, joints have numerous brown hairs in the same direction, and remnants of root scars. Relatively smooth after removing the hairs, with thin and dense longitudinal ridges. Hard texture, the steam pieces have a horn-like fractured surface, brownish-yellow or brownish-red, sun-dried pieces have a powdery fractured surface, off-white; obvious ring-like lines from the endodermis, with a relatively deep-colored core, and scattered ‘vein spots’. Distinctively aromatic odor, slightly bitter taste.
