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

Brown University - Algae
Catalog #: ABRU00004151
F. S. Collins s.n. 13 May 1907
Spirogyra gracilis Kützing
United States, Massachusetts, above Cascade, Melrose, MA

University of Michigan
Catalog #: 736638
F.S. Collins #s.n. 13 May 1907
Spirogyra gracilis Kützing
United States, Massachusetts, Middlesex, Cascade, Melrose

University of Michigan
Catalog #: 736639
F.S. Collins #s.n. 13 May 1907
Spirogyra gracilis Kützing
United States, Massachusetts, Middlesex, Cascade, Melrose

Michigan State University Algae
Catalog #: MSC0184764
F.S. Collins #s.n. 13 May 1907
Spirogyra gracilis Kützing
United States, Massachusetts, Middlesex, Stream above Cascade, Melrose

Miami University - Algae
Catalog #: 000188488
F.S. Collins #s.n.
Spirogyra gracilis Kützing
United States, Massachusetts, Middlesex, Stream above Cascade, Melrose

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00147787
949ea4d5-99ca-4d0c-85f3-12a1b004224a
F.S. Collins #s.n. 13 May 1907
Spirogyra gracilis K
United States, Massachusetts, Middlesex, Cascade, Melrose

Yale University Herbarium
Catalog #: YU.094458
Frank Shipley Collins s.n. 13 May 1907
Spirogyra gracilis Kützing
United States, Massachusetts, Melrose; above Cascade, Melrose, MA