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

Brown University - Algae
Catalog #: ABRU00004675
F. S. Collins s.n. 25 April 1912
Polysiphonia opaca (C.Agardh) Moris & De Notaris
Bermuda, Tucker's Town, Bermuda

Field Museum of Natural History
Catalog #: C0510551F
F. S. Collins #s.n. 25 April 1912
Polysiphonia opaca (C.Agardh) Moris & De Notaris
Bermuda, Tuckertown

University of Michigan
Catalog #: 668362
F.S. Collins #s.n. 25 April 1912
Polysiphonia opaca (C.Agardh) Moris & De Notaris
Bermuda, Saint George, Tuckertown

University of Michigan
Catalog #: 668382
F.S. Collins #s.n. 25 April 1912
Polysiphonia opaca (C.Agardh) Moris & De Notaris
Bermuda, Saint George, Tuckertown

Michigan State University Algae
Catalog #: MSC0184292
F.S. Collins #s.n. 25 April 1912
Polysiphonia opaca (C.Agardh) Moris & De Notaris
Bermuda, Saint George, Tuckertown

Miami University - Algae
Catalog #: 000196529
F.S. Collins #s.n.
Polysiphonia opaca (C.Agardh) Moris & De Notaris
Bermuda, Saint George, Tuckertown

Yale University Herbarium
Catalog #: YU.095143
Frank Shipley Collins s.n. 25 April 1912
Polysiphonia opaca (C.Agardh) Moris & De Notaris
Bermuda, Tucker's Town, Bermuda