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

Brown University - Algae
Catalog #: ABRU00004543
F. S. Collins s.n. 08 July 1911
Spirogyra orthospira Nägeli
United States, Massachusetts, Eastham, MA

University of Michigan
Catalog #: 736706
F.S. Collins #s.n. 08 July 1911
Spirogyra orthospira f. purpurea Gomont
United States, Massachusetts, Barnstable, Eastham

University of Michigan
Catalog #: 736708
F.S. Collins #s.n. 08 July 1911
Spirogyra orthospira f. purpurea Gomont
United States, Massachusetts, Barnstable, Eastham

Michigan State University Algae
Catalog #: MSC0184794
F.S. Collins #s.n. 08 July 1911
Spirogyra orthospira f. purpurea Gomont
United States, Massachusetts, Barnstable, Eastham

Miami University - Algae
Catalog #: 000189146
F.S. Collins #s.n.
Spirogyra orthospira f. purpurea F.S.Collins, 1911
United States, Massachusetts, Barnstable, Eastham

Yale University Herbarium
Catalog #: YU.095014
Frank Shipley Collins s.n. 08 July 1911
Spirogyra orthospira Nägeli
United States, Massachusetts, Barnstable, Eastham; Eastham, MA