Drummond, Musci Amer.
Thomas Drummond

Academy of Natural Sciences of Drexel University
Catalog #: PH00113871
T. Drummond #s.n.
Hypnum rugulosum F. Weber & D. Mohr
Canada, Collected chiefly in the ROCKY MTS., British North America

University of Michigan Herbarium
Catalog #: 608042
[no data] #s. n.
Rhytidium rugosum (Ehrh. ex Hedw.) Kindb.
, Lake Superior, Beaver Lake