tall horned beaksedge
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Poales
- family: Cyperaceae
- genus: Rhynchospora
- species: Rhynchospora macrostachya
Poquonock Bridge
Connecticut- Quincy
Florida- Socastee
South Carolina- Fort Belvoir
- Woodlawn
Virginia
United States