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

Brown University - Algae
Catalog #: ABRU00003882
N. L. Gardner s.n.
Calothrix crustacea Thuret ex Bornet & Flahault
United States, California, Alameda, CA

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00233187
f5d960cb-3049-4f7f-8296-fa7cecfef742
N. L. Gardner #s.n. 00 January 1904
Calothrix crustacea Thuret ex Bornet & Flahault
United States, California, Alameda

Michigan State University Algae
Catalog #: MSC0181507
N.L. Gardner #s.n. 00 January 1904
Calothrix crustacea f. prolifera Thuret ex Bornet & Flahault
United States, California, Alameda, Alameda

Miami University - Algae
Catalog #: 000188162
N.L. Gardner #s.n. 00 January 1904
Calothrix crustacea f. prolifera N.L.Gardner & F.S.Collins, 1904
United States, California, Alameda, Alameda

Yale University Herbarium
Catalog #: YU.092251
Nathaniel Lyon Gardner s.n.
Calothrix crustacea Thuret ex Bornet & Flahault
United States, California, Alameda, Alameda; Alameda, CA