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

Brown University - Algae
Catalog #: ABRU00003115
Mrs. W. C. Simmons s.n.
Antithamnion plumula (J.Ellis) Thuret
United States, Rhode Island, Jamestown; Conanicut Island, RI

Yale University Herbarium
Catalog #: YU.091578
Mrs. W. C. Simmons s.n. 00 February 1898
Antithamnion plumula (J.Ellis) Thuret
United States, Rhode Island, Newport, Jamestown; Conanicut Island, RI

University Herbarium, University of California, Berkeley
Catalog #: UC111602
Mrs. W. C. Simmons #s.n.
Pterothamnion plumula (J.Ellis) Nägeli
United States, Rhode Island, Conanicut, Rhode Island.

University Herbarium, University of California, Berkeley
Catalog #: UC1836317
Mrs. W. C. Simmons #s.n.
Pterothamnion plumula (J.Ellis) Nägeli
United States, Rhode Island, Newport, Conanicut Island, Rhode Island.

University of Michigan
Catalog #: 641933
Mrs. W.C. Simmons #s.n. 00 February 1898
Antithamnion plumula (J.Ellis) Thuret
United States, Rhode Island, Conanicut Island

University of Michigan
Catalog #: 670180
Mrs. W.C. Simmons #s.n. 00 February 1898
Pterothamnion plumula (J.Ellis) Nägeli
United States, Rhode Island, Newport, Conanicut Island

Michigan State University Algae
Catalog #: MSC0184241
Mrs. W.C. Simmons #s.n. 00 February 1898
Pterothamnion plumula (J.Ellis) Nägeli
United States, Rhode Island, Newport, Conanicut Island

Miami University - Algae
Catalog #: 000186903
Mrs. W.C. Simmons #s.n. 00 February 1898
Antithamnion plumula (J.Ellis) Thuret
United States, Rhode Island, Conanicut Island

University of North Carolina at Chapel Hill Herbarium; Max & Fran Hommersand Algae Herbarium: Algae
Catalog #: NCU-A-0001126
Simmons, Mrs. W. C. #P.B.-A 496 00 February 1898
Antithamnion plumula (Ellis) Thuret
United States, Rhode Island, Newport, Conanicut Island; Conanicut Island, Rhode Island.