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

University of North Carolina at Chapel Hill Herbarium; Max & Fran Hommersand Algae Herbarium: Algae
Catalog #: NCU-A-0006846
Gardner, N. L. #P.B.-A. 2201 00 May 1916
Chroococcus turgidus (KueŸtzing) NŠaegeli, 1849
United States, California, Alameda, Berkeley; Cultivated in Bot. Lab. [Botany Laboratory] University of California

Brown University - Algae
Catalog #: ABRU00005001
N. L. Gardner s.n.
Chroococcus helveticus Nägeli
United States, California, Botanical Laboratory, University of California, Berkeley, CA

Michigan State University Algae
Catalog #: MSC0181856
N.L. Gardner #s.n. 00 May 1916
Chroococcus helveticus Nägeli
United States, California, Alameda, Bot. Lab. [Botany Laboratory] University of California

Miami University - Algae
Catalog #: 000210235
N.L. Gardner #s.n. 00 May 1916
Chroococcus helveticus Nägeli
United States, California, Alameda, Bot. Lab. [Botany Laboratory] University of California

Yale University Herbarium
Catalog #: YU.095472
Nathaniel Lyon Gardner s.n.
Chroococcus helveticus Nägeli
United States, California, Alameda, Berkeley; Botanical Laboratory, University of California, Berkeley, CA