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

Brown University - Algae
Catalog #: ABRU00002537
I. Holden s.n. 16 July 1892
Calothrix crustacea Thuret ex Bornet & Flahault
United States, Connecticut, Woodmont, CT

Miami University - Algae
Catalog #: 000186409
I. Holden #s.n. 16 July 1892
Calothrix crustacea Thuret ex Bornet & Flahault
United States, Connecticut, New Haven, Woodmont

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00233047
26bfcc62-d983-4dab-8d42-b9231bb3b894
I. Holden #s.n. 16 July 1892
Calothrix crustacea Thuret ex Bornet & Flahault
United States, Connecticut, New Haven, Woodmont

Yale University Herbarium
Catalog #: YU.091089
Isaac Holden s.n. 16 July 1892
Calothrix crustacea Thuret ex Bornet & Flahault
United States, Connecticut, Woodmont, CT

Michigan State University Algae
Catalog #: MSC0181504
Isaac Holden #s.n. 16 July 1892
Calothrix crustacea Thuret ex Bornet & Flahault
United States, Connecticut, New Haven, Woodmont