Rhizoma Cyperi: Rhizoma Cyperi is also called Rhizoma Cyperi, Rhizoma Sparganii, Rhizoma Sparganii, Huitouqing, Leigongtou and Caotouxiang. It is a perennial herb of Cyperaceae, with long creeping rhizome, oval or spindle-shaped root tuber, hard, brown and fragrant; Plant height is 20 ~ 95cm. Erect, scattered, obviously triangular. Leaves basal, shorter than culm; Leaf sheaths are brown at the base and usually split into fibers. Cymes with long lateral branches are solitary or reborn, with 3 ~ 10 radial branches and 3 ~ 10 spikelets arranged in an umbrella shape; Spikelets are strip-shaped and spread obliquely; Spikelet axis has white transparent wings; Scales are ovoid or broadly ovoid, with green in the middle and purplish red or reddish brown on both sides; Stamens 3; Stigma 3. Nutlets oblong obovate, trigonous, with fine points. Seed and tuber propagation.

Cyperus sedge was born in wet farmland, roadside or wasteland, and some dry crop fields and rice fields were seriously damaged.