Collema pustulatum
- kingdom: Fungi
- phylum: Ascomycota
- class: Lecanoromycetes
- order: Peltigerales
- family: Collemataceae
- genus: Collema
- species: Collema pustulatum
Guánica- Maria Antonia
Guanica
Puerto Rico
Lookout Mountain
Georgia- Fayette
Iowa- Lookout Mountain
Tennessee
United States