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

Brown University - Algae
Catalog #: ABRU00004191
F. S. Collins s.n.
Nostoc sphaericum Vaucher ex Bornet & Flahault
United States, Maine, Cumberland, Harpswell; Harpswell, ME

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0012467
F. S. Collins #1453 00 July 1905
Nostoc sphaericum Vaucher ex Bornet & Flahault
United States, Maine, Cumberland, Harpswell

Michigan State University Algae
Catalog #: MSC0183728
F.S. Collins #s.n. 00 July 1905
Nostoc sphaericum Vaucher ex Bornet & Flahault
United States, Maine, Cumberland, Harpswell

Miami University - Algae
Catalog #: 000188526
F.S. Collins #s.n. 00 July 1905
Nostoc sphaericum Vaucher ex Bornet & Flahault
United States, Maine, Cumberland, Harpswell

Yale University Herbarium
Catalog #: YU.094498
Frank Shipley Collins s.n.
Nostoc sphaericum Vaucher ex Bornet & Flahault
United States, Maine, Cumberland, Harpswell; Harpswell, ME