Cystoclonium purpureum
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Gigartinales
- family: Cystocloniaceae
- genus: Cystoclonium
- species: Cystoclonium purpureum
- France
- Stykkishólmur
West
Iceland- Edgartown
- Gloucester
- Lynn
- Nahant
- Rockport
- Swampscott
Massachusetts- Hampton
New Hampshire
United States