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

Brown University - Algae
Catalog #: ABRU00004916
C. Bullard s.n. 29 May 1916
Cosmarium pyramidatum Brébisson ex Ralfs
United States, Massachusetts, west of Lexington Park, Bedford, MA

Yale University Herbarium
Catalog #: YU.095385
Charles Bullard s.n. 29 May 1916
Cosmarium pyramidatum Brébisson ex Ralfs
United States, Massachusetts, west of Lexington Park, Bedford, MA

University of Michigan
Catalog #: 736180
Charles Bullard #s.n. 29 May 1916
Cosmarium pyramidatum Brébisson ex Ralfs
United States, Massachusetts, Middlesex, west of Lexington Park, Bedford

Michigan State University Algae
Catalog #: MSC0182229
Charles Bullard #s.n. 29 May 1916
Cosmarium pyramidatum Brébisson ex Ralfs
United States, Massachusetts, Middlesex, west of Lexington Park, Bedford

Miami University - Algae
Catalog #: 000210151
Charles Bullard #s.n.
Cosmarium pyramidatum Brébisson ex Ralfs
United States, Massachusetts, Middlesex, west of Lexington Park, Bedford