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

Brown University - Algae
Catalog #: ABRU00003069
Mrs. W. C. Simmons s.n. 25 April 1898
Spirogyra tenuissima (Hassall) Kützing
United States, Rhode Island, Easton's Point, Newport, RI

Yale University Herbarium
Catalog #: YU.091538
Mrs. W. C. Simmons s.n. 25 April 1898
Spirogyra tenuissima (Hassall) Kützing
United States, Rhode Island, Newport, Newport; Easton's Point, Newport, RI

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00147859
651e1eca-a8d0-4bd1-8984-73f959a73202
Mrs. W. C. Simmons #s.n. 25 April 1898
Spirogyra tenuissima (Hassall) K
United States, Rhode Island, Easton's Point, Newport

University of Michigan
Catalog #: 736742
Mrs. W.C. Simmons #s.n. 25 April 1898
Spirogyra tenuissima (Hassall) Kützing
United States, Rhode Island, Newport, Easton's Point, Newport

University of Michigan
Catalog #: 736743
Mrs. W.C. Simmons #s.n. 25 April 1898
Spirogyra tenuissima (Hassall) Kützing
United States, Rhode Island, Newport, Easton's Point, Newport

Michigan State University Algae
Catalog #: MSC0184811
Mrs. W.C. Simmons #s.n. 25 April 1898
Spirogyra tenuissima (Hassall) Kützing
United States, Rhode Island, Newport, Easton's Point, Newport

Miami University - Algae
Catalog #: 000186395
W.C. Simmons #s.n. 25 April 1898
Spirogyra tenuissima (Hassall) Kützing
United States, Rhode Island, Newport, Easton's Point, Newport