Collins, Holden & Setchell, Phycoth. Bor.-Amer.
Collins, F.S.; Holden, I.; Setchell, W.A. [1-2300]

Brown University - Algae
Catalog #: ABRU00004498
N. L. Gardner s.n. 06 January 1906
Monostroma amorphum
United States, California, University of California, Berkeley, CA

Field Museum of Natural History
Catalog #: C0526506F
N. L. Gardner #s.n. 06 January 1906
Monostroma amorphum
United States, California, Alameda, University of California, Berkeley campus

University of Michigan
Catalog #: 1306567
N.L. Gardner #1730 06 January 1906
Monostroma amorphum
United States, California, Alameda, Campus, University of California, Berkeley

Michigan State University Algae
Catalog #: MSC0183533
N.L. Gardner #1730 06 January 1906
Monostroma amorphum
United States, California, Alameda, Campus, University of California, Berkeley

Miami University - Algae
Catalog #: 000210579
N.L. Gardner #1730
Monostroma amorphum
United States, California, Alameda, Campus, University of California, Berkeley

University of Michigan
Catalog #: 730159
N.L. Gardner #s.n. 09 January 1906
Monostroma amorphum
United States, California, Alameda, Berkeley

Yale University Herbarium
Catalog #: YU.094969
Nathaniel Lyon Gardner s.n. 06 January 1906
Monostroma Thuret, 1854
United States, California, University of California, Berkeley, CA