Roellia Kindberg, 1897.

Roellia is a monotypic genus that appears as a very large Bryum but its cells are among the largest of our local bryophytes. When one encounters a large and comose acrocarpous moss on forest litter, a quick look for the large cells will establish its identity. Many earlier works considered Roellia roellii merely to be a large Bryum (Bryum sandbergii). Now, Roellia has been transferred not only out of Bryum, but also out of the Bryaceae into the Mniaceae.
see key to Bryum Etc.

Species included:
Roellia roellii (Brotherus ex Röll) Andrews in H. Crum