Polysiphonia rhizoidea
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Rhodomelaceae
- genus: Polysiphonia
- species: Polysiphonia rhizoidea
Iroquois Point- ‘Ewa Beach
Hawaii
United States
Polysiphonia rhizoidea Iroquois Point ‘Ewa Beach