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Tilden, Amer. Algae
Tilden, J.E. [1-650]
Field Museum of Natural History
Catalog #: C0512858F
Josephine E. Tilden #s.n. 01 June 1898
Polysiphonia nigrescens (Hudson) Greville ex Harvey
United States, Washington, San Juan, Minnesota Reef, San Juan Island
Michigan State University Algae
Catalog #: MSC0184286
Josephine E. Tilden #s.n. 01 June 1898
Polysiphonia nigrescens (Hudson) Greville ex Harvey
United States, Washington, San Juan, Minnesota Reef, San Juan Island
Miami University - Algae
Catalog #: 000179590
Josephine E. Tilden #s.n. 01 June 1898
Polysiphonia nigrescens (Hudson) Greville ex Harvey
United States, Washington, San Juan, Minnesota Reef, San Juan Island
Butler University
Catalog #: 503782
Josephine E. Tilden #s.n. 01 June 1898
Polysiphonia nigrella P.L.Crouan & H.M.Crouan
United States, Washington, San Juan, Minnesota reef, San Juan island