Cladonia firma
- kingdom: Fungi
- phylum: Ascomycota
- class: Lecanoromycetes
- order: Lecanorales
- family: Cladoniaceae
- genus: Cladonia
- species: Cladonia firma
Globasnitz
Carinthia
Austria
Saint Peter Port
St Peter Port
Guernsey
Saint Helier
St Helier
Jersey
Güimar
Canary Islands
Spain
Los Osos
California
United States