round silk moss
- kingdom: Plantae
- phylum: Bryophyta
- class: Bryopsida
- order: Hypnales
- family: Plagiotheciaceae
- genus: Plagiothecium
- species: Plagiothecium cavifolium
Niagara Falls
Parry Sound
Sault Ste. Marie
Ontario
Beloeil
Mont-Saint-Hilaire
Quebec
Canada
Porvoo
Central Finland
Siilinjärvi
Southern Ostrobothnia
Finland
Narsaq
Kujalleq
Greenland
East Hartford
East Haven
Ellington
New Haven
Connecticut
Brookfield
La Grange Park
North Riverside
Riverside
Illinois
Rockville
Indiana
Timonium
Maryland
Alpine
Closter
Demarest
Harrington Park
Norwood
Ogdensburg
New Jersey
Urbana
Ohio
Birchwood Lakes
Mount Pocono
Pennsylvania
Charles City
Covington
Fairlawn
Virginia
United States
Geta
Ettelbruck
Nättraby