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

Brown University - Algae
Catalog #: ABRU00004092
N. L. Gardner s.n. 14 July 1906
Cosmarium pseudopyramidatum P.Lundell
United States, California, Marin, Mount Tamalpais, CA

University of Michigan
Catalog #: 736165
N.L. Gardner #s.n. 14 July 1906
Cosmarium pseudopyramidatum P.Lundell
United States, California, Marin, Mount Tamalpais

University of Michigan
Catalog #: 736167
N.L. Gardner #s.n. 14 July 1906
Cosmarium pseudopyramidatum P.Lundell
United States, California, Marin, Mount Tamalpais

Michigan State University Algae
Catalog #: MSC0182225
N.L. Gardner #s.n. 14 July 1906
Cosmarium pseudopyramidatum P.Lundell
United States, California, Marin, Mount Tamalpais

Miami University - Algae
Catalog #: 000188432
N.L. Gardner #s.n.
Cosmarium pseudopyramidatum P.Lundell
United States, California, Marin, Mount Tamalpais

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00142675
83390c21-086a-4b1c-8262-ad40d18f09fa
N.L. Gardner #s.n. 14 July 1906
Cosmarium pseudopyramidatum P.Lundell
United States, California, Marin, Mount Tamalpais

Yale University Herbarium
Catalog #: YU.094400
Nathaniel Lyon Gardner s.n. 14 July 1906
Cosmarium pseudopyramidatum P.Lundell
United States, California, Marin, Mount Tamalpais, CA