Isothecium cristatum
- kingdom: Plantae
- phylum: Bryophyta
- class: Bryopsida
- order: Hypnales
- family: Brachytheciaceae
- genus: Isothecium
- species: Isothecium cristatum
- Nanaimo
- North Saanich
- Vancouver
- Victoria
British Columbia
Canada- Felton
- Monterey
- Moraga
- Oakland
- Pacific Grove
- Sacramento
- Santa Cruz
- Seaside
- Stanford
California- Friday Harbor
- Port Angeles
- Seattle
Washington
United States