Smooth rock tripe
- kingdom: Fungi
- phylum: Ascomycota
- class: Lecanoromycetes
- order: Umbilicariales
- family: Umbilicariaceae
- genus: Umbilicaria
- species: Umbilicaria mammulata
- Shelburne
Nova Scotia- La Tuque
- Saint-Félicien
Quebec
Canada- Lookout Mountain
Georgia- Concord
- Gloucester
- Lanesborough
- Sheffield
- Stockbridge
- Winchester
Massachusetts- Keene
- Mont Vernon
- North Conway
- Temple
New Hampshire- Cinnaminson
- Hopatcong
- Mount Arlington
- Ringwood
- Riverton
- Succasunna
New Jersey- Balfour
- Boone
- Danbury
- Hendersonville
North Carolina- Lookout Mountain
Tennessee- Brattleboro
- Newfane
Vermont- Monterey
Virginia- Saint Croix Falls
Wisconsin
United States