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

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0017150
Mrs. W. C. Simmons #544 00 April 1898
Vertebrata nigra (Hudson) Díaz-Tapia & Maggs, 2017
United States, Rhode Island, Newport, Newport

University Herbarium, University of California, Berkeley
Catalog #: UC111754
Mrs. W. C. Simmons #s.n.
Polysiphonia nigra (Hudson) Batters
United States, Rhode Island, Newport, Rhode Island.

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00220787
c921e11b-3ce3-4e1e-8d56-3df5e8c33088
Mrs. W. C. Simmons #s.n.
Polysiphonia atrorubescens (Dillwyn) Greville
United States, Rhode Island, Newport

University of Michigan
Catalog #: 668325
Mrs. W.C. Simmons #s.n. 00 April 1898
Vertebrata nigra (Hudson) Diaz-Tapia & Maggs
United States, Rhode Island, Newport, Newport

University of Michigan
Catalog #: 668349
Mrs. W.C. Simmons #s.n. 00 April 1898
Vertebrata nigra (Hudson) Diaz-Tapia & Maggs
United States, Rhode Island, Newport, Newport

Michigan State University Algae
Catalog #: MSC0184245
Mrs. W.C. Simmons #s.n. 00 April 1898
Polysiphonia atrorubescens (Dillwyn) Greville
United States, Rhode Island, Newport, Newport