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Tilden, Amer. Algae
Tilden, J.E. [1-650]
Michigan State University Algae
Catalog #: MSC0184027
Josephine E. Tilden #s.n. 12 August 1901
Phormidium retzii (C.Agardh) Kützing ex Gomont
United States, Minnesota, Saint Louis, Minnesota Point, Duluth
Miami University - Algae
Catalog #: 000185092
Josephine E. Tilden #s.n. 12 August 1901
Phormidium retzii (C.Agardh) Kützing ex Gomont
United States, Minnesota, Hennepin, Minnesota Point, Duluth