Limbella (Brotherus) Brotherus, 1927.

Limbella is easily recognized as a fairly large pleurocarpous moss with the long lanceolate leaves bordered by a limbidium of elongate and thick-walled cells. It is now known from a single wetland site in coastal Oregon. Limbella tricostata, the sister species to L. fryei, is an Hawaiian endemic.
see key to Amblystegium Etc.

Species included:
Limbella fryei (R. S. Williams) Ochyra, not known from CA