red-root flat sedge
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Poales
- family: Cyperaceae
- genus: Cyperus
- species: Cyperus erythrorhizos
- Osoyoos
- Pitt Meadows
British Columbia
Canada- Mobile
- Northport
- Tuscaloosa
Alabama- Guerneville
- Monte Rio
- Rubidoux
California- Sheridan
Colorado- Norco
- Saint Gabriel
Louisiana- Cabin John
- Jessup
- Mount Rainier
Maryland- Haslett
Michigan- Corvallis
- Eugene
- Gold Beach
Oregon- Oroville
- Ridgefield
- Selah
- White Salmon
Washington- Washington, D. C.
Washington, D.C.
United States