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

Brown University - Algae
Catalog #: ABRU00004910
N. L. Gardner s.n.
Closterium pritchardianum W.Archer
United States, California, Golden Gate Park, San Francisco, CA

Yale University Herbarium
Catalog #: YU.095379
Nathaniel Lyon Gardner s.n.
Closterium pritchardianum W.Archer
United States, California, San Francisco, San Francisco; Golden Gate Park, San Francisco, CA