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

Brown University - Algae
Catalog #: ABRU00003181
I. Holden s.n. 30 October 1898
Gloeocapsa violacea (Corda) Rabenhorst
United States, Connecticut, Gaylordsville, CT

Miami University - Algae
Catalog #: 000187089
I. Holden #s.n. 30 October 1898
Gloeocapsa violacea (Corda) Rabenhorst
United States, Connecticut, Litchfield, Gaylordsville

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00234363
4970a499-8413-4588-9ed1-7f7db75c92bb
I. Holden #s.n. 30 October 1898
Gloeocapsa K
United States, Connecticut, Litchfield, Gaylordsville

Yale University Herbarium
Catalog #: YU.091634
Isaac Holden s.n. 30 October 1898
Gloeocapsa violacea (Corda) Rabenhorst
United States, Connecticut, Gaylordsville; Gaylordsville, CT

Michigan State University Algae
Catalog #: MSC0182785
Isaac Holden #s.n. 30 October 1898
Gloeocapsa violacea (Corda) Rabenhorst
United States, Connecticut, Litchfield, Gaylordsville