Howe, Hepat. Calif.
Howe

University of Vermont, Pringle Herbarium, North American bryophytes
Catalog #: UVMVT014723
#s.n. 00 April 1892
Radula bolanderi Gottsche
United States of America, California, Marin, Mill Valley;

Field Museum of Natural History
Catalog #: C0047562F
3da03236-f20d-45d9-a40f-b4c1e8a637b9
M. A. Howe #s.n. 12 April 1892
Radula spicata Austin
United States, California, Marin, Mill Valley

University of Wisconsin - Madison
Catalog #: WIS-B-0028637
Marshall A. Howe #s.n. 12 April 1892
Radula formosa (C.F.W. Meissn. ex Spreng.) Nees
United States, California, Marin, Mill Valley