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

Brown University - Algae
Catalog #: ABRU00004869
A. B. Hervey s.n. 16 March 1915
Petrosiphon adhaerens M.A.Howe
Bermuda, Harris Bay, Bermuda

University of Michigan
Catalog #: 731112
A.B. Hervey #s.n. 16 March 1915
Petrosiphon adhaerens M.A.Howe
Bermuda, Harris Bay

University of Michigan
Catalog #: 731118
A.B. Hervey #s.n. 16 March 1915
Petrosiphon adhaerens M.A.Howe
Bermuda, Harris Bay

Michigan State University Algae
Catalog #: MSC0183978
A.B. Hervey #s.n. 16 March 1915
Petrosiphon adhaerens M.A.Howe
Bermuda, Harris Bay

Miami University - Algae
Catalog #: 000210107
A.B. Hervey #s.n. 16 March 1915
Petrosiphon adhaerens M.A.Howe
Bermuda, Harris Bay

Yale University Herbarium
Catalog #: YU.095338
Alpheus Baker Hervey s.n. 16 March 1915
Petrosiphon adhaerens M.A.Howe
Bermuda, Harris Bay, Bermuda