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

Brown University - Algae
Catalog #: ABRU00005071
F. S. Collins s.n. 29 March 1918
Phormidium incrustatum var. cataractarum (Nägeli) Gomont
United States, Illinois, Saint Clair, Falling Spring, IL

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0012539
F. S. Collins #2256 29 March 1918
Phormidium incrustatum var cataractum
United States, Illinois, Saint Clair, Falling Spring; Falling Spring

Michigan State University Algae
Catalog #: MSC0184054
F.S. Collins #s.n. 29 March 1918
Phormidium incrustatum var. cataractum (Nägeli) Gomont ex Gomont
United States, Illinois, Saint Clair, Falling Spring

Miami University - Algae
Catalog #: 000210290
F.S. Collins #s.n.
Phormidium incrustatum var. cataractum
United States, Illinois, Saint Clair, Falling Spring

Yale University Herbarium
Catalog #: YU.095537
Frank Shipley Collins s.n. 29 March 1918
Phormidium incrustatum var. cataractarum (Nägeli) Gomont
United States, Illinois, Saint Clair, Falling Spring, IL