Cyperus castaneus
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Poales
- family: Cyperaceae
- genus: Cyperus
- species: Cyperus castaneus
Cayuga Heights- East Ithaca
- Ithaca
- South Hill
New York- Bellows Falls
Vermont
United States