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

Field Museum of Natural History
Catalog #: C0512809F
Mrs W. C. Simmons #s.n. 00 May 1898
Polysiphonia nigrescens var. affinis (Moore) Harvey
United States, Rhode Island, Newport, Newport

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00221097
8becb132-abff-4ac6-8567-14e43305e821
Mrs. W. C. Simmons #s.n. 00 May 1898
Polysiphonia nigrescens (Hudson) Greville ex Harvey
United States, Rhode Island, Newport, Newport

University of Michigan
Catalog #: 668167
Mrs. W.C. Simmons #s.n. 00 May 1898
Polysiphonia fucoides (Hudson) Greville
United States, Rhode Island, Newport, Newport

University of Michigan
Catalog #: 668195
Mrs. W.C. Simmons #s.n. 00 May 1898
Polysiphonia fucoides (Hudson) Greville
United States, Rhode Island, Newport, Newport

Michigan State University Algae
Catalog #: MSC0184287
Mrs. W.C. Simmons #s.n. 00 May 1898
Polysiphonia nigrescens var. affinis (Moore) Harvey
United States, Rhode Island, Newport, Newport