Frosted wart lichen
- kingdom: Fungi
- phylum: Ascomycota
- class: Lecanoromycetes
- order: Pertusariales
- family: Pertusariaceae
- genus: Pertusaria
- species: Pertusaria subambigens
North Saanich
British Columbia
Canada
Felton
California- Oakridge
Oregon- Bellingham
- Friday Harbor
- North Bend
- Westport
Washington
United States