Gyrothyra underwoodiana
- kingdom: Plantae
- phylum: Marchantiophyta
- class: Jungermanniopsida
- order: Jungermanniales
- family: Gyrothyraceae
- genus: Gyrothyra
- species: Gyrothyra underwoodiana
Anmore- Maple Ridge
- Ucluelet
British Columbia
Canada
Crescent City- Eureka
California- Montesano
- Snoqualmie
- South Bend
Washington
United States