Distribution: Central U.S. to South America

Habitat: Weedy, usually moist

Recognition: With distinctively retrorse-scabrous culm

Cyperus distinctus is similar but has smooth culm and achenes with  white-spongy base.

Also similar is C. virens, which has antrorsely scabrous culms

Florida status:  Native.  Weedy and one of the most frequently encountered sedges in our area.