Cyperus tetragonus Elliott
Distribution: Southern U.S. and some western states
Habitat: Dryish sandy habitats
Florida status: Native
Recognition: Stigmas 3, the achene triangular. Spikelets widely spaced with the rachis visible, mostly < 8 mm long, about 1.5-2 mm wide. (Spikelets longer and narrower in similar C. strigosus)