fern flatsedge
- kingdom: Plantae
- phylum: Tracheophyta
- class: Liliopsida
- order: Poales
- family: Cyperaceae
- genus: Cyperus
- species: Cyperus filicinus
Dauphin Island
Alabama- Barataria
- Eden Isle
- Grand Isle
- Jean Lafitte
Louisiana- Chesapeake Beach
- Deale
- Mayo
- North Beach
- Riva
- Solomons
Maryland- Mattapoisett
- Mattapoisett Center
Massachusetts- Little Ferry
- Moonachie
- Ridgefield Park
New Jersey
United States