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

Brown University - Algae
Catalog #: ABRU00003992
Mrs. W. C. Simmons s.n. 02 March 1905
Monostroma lactuca J.Agardh
United States, Rhode Island, Jamestown; Conanicut, RI

Yale University Herbarium
Catalog #: YU.094297
Mrs. W. C. Simmons s.n. 02 March 1905
Monostroma lactuca J.Agardh
United States, Rhode Island, Newport, Jamestown; Conanicut, RI

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00205445
11702706-82d4-437b-9465-79c982252bb6
Mrs. W. C. Simmons #s.n. 02 March 1905
Monostroma lactuca J.Agardh
United States, Rhode Island, Newport, Conanicut

University of Michigan
Catalog #: 730174
Mrs. W.C. Simmons #s.n. 02 May 1905
Monostroma lactuca J.Agardh
United States, Rhode Island, Conanicut, Jamestown

University of Michigan
Catalog #: 730204
Mrs. W.C. Simmons #s.n. 02 May 1905
Monostroma grevillei (Thuret) Wittrock
United States, Rhode Island, Conanicut, Jamestown

University of North Carolina at Chapel Hill Herbarium; Max & Fran Hommersand Algae Herbarium: Algae
Catalog #: NCU-A-0033352
Simmons, Mrs. W. C. #s.n. 02 March 1905
Monostroma lactuca J.Agardh
United States, Rhode Island, Newport, Conanicut, Rhode Island

Field Museum of Natural History
Catalog #: C0526543F
W. C. Simmons #s.n. 02 March 1905
Monostroma lactuca J.Agardh
United States, Rhode Island, Newport, Conanicut Island

Michigan State University Algae
Catalog #: MSC0183540
W.C. Simmons #s.n. 02 May 1905
Monostroma lactuca J.Agardh
United States, Rhode Island, Newport, Conanicut, Jamestown

Miami University - Algae
Catalog #: 000188267
W.C. Simmons #s.n.
Monostroma lactuca J.Agardh
United States, Rhode Island, Newport, Conanicut, Jamestown