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

Brown University - Algae
Catalog #: ABRU00002935
I. Holden s.n.
Pleonosporium borreri (Smith) Nägeli
United States, Connecticut, Penfield Reef, near Bridgeport, CT

Yale University Herbarium
Catalog #: YU.091424
Isaac Holden s.n. 05 July 1897
Pleonosporium borreri (Smith) Nägeli
United States, Connecticut, Penfield Reef, near Bridgeport, CT

Michigan State University Algae
Catalog #: MSC0184095
Isaac Holden #s.n.
Pleonosporium borreri (Smith) Nägeli
United States, Connecticut, Fairfield, Bridgeport

Miami University - Algae
Catalog #: 000186753
Isaac Holden #s.n.
Pleonosporium borreri (Smith) Nägeli
United States, Connecticut, Fairfield, Penfield Reef, near Bridgeport