ridged smoothcap moss
- kingdom: Plantae
- phylum: Bryophyta
- class: Bryopsida
- order: Polytrichales
- family: Polytrichaceae
- genus: Atrichum
- species: Atrichum altecristatum
Owen Sound
Ontario
Canada
Brookfield- La Grange Park
- North Riverside
- Riverside
Illinois- Boothbay Harbor
- Dixmont
- Harrison
Maine- Pipestone
Minnesota- Forest
Mississippi- Independence
- St. Louis
Missouri- Frenchtown
New Jersey- Dobbs Ferry
- Hastings-on-Hudson
- Pound Ridge
New York- Reading
- West Reading
Pennsylvania- White River Junction
- Wilder
Vermont
United States