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

Brown University - Algae
Catalog #: ABRU00003712
N. L. Gardner s.n. 01 October 1902
Spirogyra orbicularis Kützing
United States, California, San Leandro, CA

University of Michigan
Catalog #: 736701
N.L. Gardner #s.n. 01 October 1902
Spirogyra orbicularis Kützing
United States, California, Alameda, San Leandro

University of Michigan
Catalog #: 736702
N.L. Gardner #s.n. 01 October 1902
Spirogyra orbicularis Kützing
United States, California, Alameda, San Leandro

Michigan State University Algae
Catalog #: MSC0184785
N.L. Gardner #s.n. 01 October 1902
Spirogyra maxima (Hassall) Wittrock
United States, California, Alameda, San Leandro

Miami University - Algae
Catalog #: 000187995
N.L. Gardner #s.n. 01 October 1902
Spirogyra obicularis
United States, California, Alameda, San Leandro

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00147820
f8036f49-de96-4d18-97d1-a9c09bd05205
N.L. Gardner #s.n. 01 October 1902
Spirogyra orbicularis K
United States, California, Alameda, San Leandro

Yale University Herbarium
Catalog #: YU.092101
Nathaniel Lyon Gardner s.n. 01 October 1902
Spirogyra orbicularis Kützing
United States, California, San Leandro, CA