Hymenium; Habitat: Granitic boulders on lakeshore; Location: Shore of Double Lake, Cabinet Range; Substrate: Grimmia over granite; Elevation: 1640 meters; Notes: F. caesioatra det. Hertel.
Spores; Habitat: Granitic boulders on lakeshore; Location: Shore of Double Lake, Cabinet Range; Substrate: Grimmia over granite; Elevation: 1640 meters; Notes: F. caesioatra det. Hertel.