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

Brown University - Algae
Catalog #: ABRU00002966
F. S. Collins s.n. 28 July 1893
Spirogyra varians (Hassall) Kützing
United States, Maine, Hancock, Eagle Island, Penobscot Bay, ME

University Herbarium, University of California, Berkeley
Catalog #: UC1827989
F. S. Collins #s.n. 28 August 1893
Spirogyra varians (Hassall) Kützing
United States, Maine, Hancock, In a cold spring, just above high water mark, Eagle Island, Penobscot Bay

University of Michigan
Catalog #: 736746
F.S. Collins #s.n. 28 July 1893
Spirogyra varians (Hassall) Kützing
United States, Maine, Hancock, Eagle Island, Penobscot Bay

University of Michigan
Catalog #: 736752
F.S. Collins #s.n. 28 July 1893
Spirogyra varians (Hassall) Kützing
United States, Maine, Hancock, Eagle Island, Penobscot Bay

Michigan State University Algae
Catalog #: MSC0184812
F.S. Collins #s.n. 28 July 1893
Spirogyra varians (Hassall) Kützing
United States, Maine, Cumberland, Eagle Island, Penobscot Bay

Miami University - Algae
Catalog #: 000186778
F.S. Collins #s.n. 28 July 1893
Spirogyra varians (Hassall) Kützing
United States, Maine, Cumberland, Eagle Island, Penobscot Bay

Yale University Herbarium
Catalog #: YU.091449
Frank Shipley Collins s.n. 28 July 1893
Spirogyra varians (Hassall) Kützing
United States, Maine, Hancock, Eagle Island, Penobscot Bay, ME