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

Brown University - Algae
Catalog #: ABRU00002815
I. Holden s.n.
Batrachospermum virgatum Sirodot
United States, Connecticut, Bridgeport, CT

Field Museum of Natural History
Catalog #: C0504351F
I. Holden #s.n. 24 November 1889
Batrachospermum virgatum Sirodot
United States, Connecticut, Bridgeport

Yale University Herbarium
Catalog #: YU.106459
Isaac Holden s.n.
Batrachospermum virgatum Sirodot
United States, Connecticut, Fairfield, Bridgeport; Bridgeport, CT

University of Michigan
Catalog #: 642975
Isaac Holden #s.n.
Batrachospermum virgatum Sirodot
United States, Connecticut, Bridgeport

Michigan State University Algae
Catalog #: MSC0181340
Isaac Holden #s.n.
Batrachospermum helminthosum Bory de Saint-Vincent
United States, Connecticut, Fairfield, Bridgeport

Miami University - Algae
Catalog #: 000186592
Isaac Holden #s.n.
Batrachospermum virgatum Sirodot
United States, Connecticut, Bridgeport