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

Brown University - Algae
Catalog #: ABRU00003824
F. S. Collins s.n. 14 August 1903
Calothrix stagnalis Gomont
United States, Massachusetts, Medford, MA

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0012305
F. S. Collins #1114 14 August 1903
Calothrix stagnalis Gomont
United States, Massachusetts, Middlesex, Medford; Medford, MA; 42.423752 -71.107194

Michigan State University Algae
Catalog #: MSC0181539
F.S. Collins #s.n. 14 August 1903
Calothrix stagnalis Gomont
United States, Massachusetts, Middlesex, Medford

Miami University - Algae
Catalog #: 000188104
F.S. Collins #s.n.
Calothrix stagnalis Gomont
United States, Massachusetts, Middlesex, Medford

Yale University Herbarium
Catalog #: YU.092197
Frank Shipley Collins s.n. 14 August 1903
Calothrix stagnalis Gomont
United States, Massachusetts, Middlesex, Medford; Medford, MA