Spirogyra crassa
- kingdom: Plantae
- phylum: Charophyta
- class: Zygnematophyceae
- order: Zygnematales
- family: Zygnemataceae
- genus: Spirogyra
- species: Spirogyra crassa
Matosinhos
Porto
Portugal
Charleston- Newton
Illinois- Greencastle
Indiana- Wellesley
Massachusetts
United States