Grinnellia americana
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Delesseriaceae
- genus: Grinnellia
- species: Grinnellia americana
Bridgeport- Old Saybrook
- Old Saybrook Center
Connecticut- Jupiter
Florida- Bayonne
- Cliffwood Beach
- Laurence Harbor
New Jersey- Beaufort
North Carolina- Portsmouth
Rhode Island
United States