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-0033322
Gardner, N. L. #s.n. 15 November 1905
Pleurocapsa amethystea Rosenvinge
United States, California, Alameda, near Berkeley, California

Brown University - Algae
Catalog #: ABRU00004463
N. L. Gardner s.n. 15 November 1905
Pleurocapsa amethystea var. schmidtii
United States, California, near Berkeley, CA

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0012556
N. L. Gardner s.n. 15 November 1905
Chroococcopsis amethystea (Rosenvinge) Geitler
United States, California, Berkeley; Near Berkeley, California

Field Museum of Natural History
Catalog #: C0172558F
N. L. Gardner #s.n. 15 November 1905
Pleurocapsa amethystea Rosenvinge
United States, California, Alameda, near Berkeley

Michigan State University Algae
Catalog #: MSC0181852
N.L. Gardner #s.n. 15 November 1905
Chroococcopsis amethystea (Rosenvinge) Geitler
United States, California, Alameda, Berkeley

Miami University - Algae
Catalog #: 000210544
N.L. Gardner #s.n. 15 November 1905
Chroococcopsis amethystea (Rosenvinge) Geitler
United States, California, Alameda, Berkeley

Yale University Herbarium
Catalog #: YU.094932
Nathaniel Lyon Gardner s.n. 15 November 1905
Pleurocapsa amethystea Rosenvinge
United States, California, near Berkeley, CA