Pleonosporium squarrulosum
- kingdom: Plantae
- phylum: Rhodophyta
- class: Florideophyceae
- order: Ceramiales
- family: Wrangeliaceae
- genus: Pleonosporium
- species: Pleonosporium squarrulosum
Carmel-by-the-Sea- Del Monte Forest
- Isla Vista
California
United States