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

Brown University - Algae
Catalog #: ABRU00002887
I. Holden s.n. 13 May 1894
Phormidium corium (C.Agardh) Kützing
United States, Connecticut, Moody's Pond, Bridgeport, CT

Yale University Herbarium
Catalog #: YU.091386
Isaac Holden s.n. 13 May 1894
Phormidium corium (C.Agardh) Kützing
United States, Connecticut, Bridgeport; Moody's Pond, Bridgeport, CT

Michigan State University Algae
Catalog #: MSC0184045
Isaac Holden #s.n. 13 May 1894
Phormidium corium (C.Agardh) Kützing
United States, Connecticut, Fairfield, Dam at Moody's Pond, Bridgeport

Miami University - Algae
Catalog #: 000186711
Isaac Holden #s.n. 13 May 1894
Phormidium corium (C.Agardh) Kützing
United States, Connecticut, Fairfield, Dam at Moody's Pond, Bridgeport