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

Brown University - Algae
Catalog #: ABRU00004317
F. S. Collins s.n. 23 May 1909
Spirogyra insignis (Hassall) Kützing
United States, Massachusetts, Middlesex Fells, MA

University Herbarium, University of California, Berkeley
Catalog #: UC751172
F. S. Collins #s.n. 23 May 1909
Spirogyra insignis (Hassall) Kützing
United States, Massachusetts, Middlesex, Middlesex Fells

University of Michigan
Catalog #: 736657
F.S. Collins #s.n. 23 May 1909
Spirogyra insignis (Hassall) Kützing
United States, Massachusetts, Middlesex, Middlesex Fells

University of Michigan
Catalog #: 736659
F.S. Collins #s.n. 23 May 1909
Spirogyra insignis (Hassall) Kützing
United States, Massachusetts, Middlesex, Middlesex Fells

Michigan State University Algae
Catalog #: MSC0184768
F.S. Collins #s.n. 23 May 1909
Spirogyra insignis (Hassall) Kützing
United States, Massachusetts, Middlesex, Middlesex Fells

Miami University - Algae
Catalog #: 000189043
F.S. Collins #s.n. 23 May 1909
Spirogyra insignis (Hassall) Kützing
United States, Massachusetts, Middlesex, Middlesex Fells

Yale University Herbarium
Catalog #: YU.094624
Frank Shipley Collins s.n. 23 May 1909
Spirogyra insignis (Hassall) Kützing
United States, Massachusetts, Middlesex, Medford; Middlesex Fells, MA