brownish beakrush
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Poales
- family: Cyperaceae
- genus: Rhynchospora
- species: Rhynchospora capitellata
- Canada
Ashland
Alabama- Graton
California- Georgetown
Delaware- Thornton
Illinois- Gary
Indiana- Beltsville
- Berwyn Heights
- Bladensburg
- Calverton
- Charlotte Hall
- Chillum
- Clinton
- College Park
- Colmar Manor
- Cottage City
- District Heights
- East Riverdale
- Fort Meade
- Havre de Grace
- Hillcrest Heights
- Marlow Heights
- Morningside
- Mount Rainier
- Owings
- Perryville
- Princess Anne
- Riverdale Park
- Silver Hill
- Suitland
- Takoma Park
- University Park
Maryland- Folsom
New Jersey- Washington, D. C.
Washington, D.C.
United States
Beauceville