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

Brown University - Algae
Catalog #: ABRU00004194
F. S. Collins s.n. 13 July 1905
Calothrix confervicola var. purpurea Bornet & Flahault
United States, Maine, Cumberland, Harpswell; Stover's Point, Harpswell, ME

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0012294
F. S. Collins #1456 13 July 1905
Calothrix confervicola var purpurea
United States, Maine, Cumberland, Harpswell; Stover's Point

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00232979
3aad8572-5989-4f32-9f11-04bec3d1e652
F. S. Collins #s.n. 13 July 1905
Calothrix confervicola C.Agardh ex Bornet & Flahault
United States, Maine, Cumberland, Stover's Point, Harpswell

Michigan State University Algae
Catalog #: MSC0181500
F.S. Collins #s.n. 13 July 1905
Calothrix confervicola var. purpurea Bornet & Flahault
United States, Maine, Cumberland, Stover's Point, Harpswell

Miami University - Algae
Catalog #: 000188529
F.S. Collins #s.n. 13 July 1905
Calothrix confervicola var. purpurea Bornet & Flahault
United States, Maine, Cumberland, Stover's Point, Harpswell

Yale University Herbarium
Catalog #: YU.094501
Frank Shipley Collins s.n. 13 July 1905
Calothrix confervicola var. purpurea Bornet & Flahault
United States, Maine, Cumberland, Harpswell; Stover's Point, Harpswell, ME