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

Brown University - Algae
Catalog #: ABRU00004591
F. S. Collins s.n. 17 September 1911
Cosmarium margaritatum (P.Lundell) J.Roy & Bisset
United States, Rhode Island, Washington's Pond, Cranston, RI

University of Michigan
Catalog #: 736121
F.S. Collins #s.n. 17 September 1911
Cosmarium margaritatum (P.Lundell) J.Roy & Bisset
United States, Rhode Island, Providence, Washington's Pond, Cranston

University of Michigan
Catalog #: 736126
F.S. Collins #s.n. 17 September 1911
Cosmarium margaritiferum Meneghini ex Ralfs
United States, Rhode Island, Providence, Washington's Pond, Cranston

Michigan State University Algae
Catalog #: MSC0182210
F.S. Collins #s.n. 17 September 1911
Cosmarium margaritatum (P.Lundell) J.Roy & Bisset
United States, Rhode Island, Providence, Washington's Pond, Cranston

Miami University - Algae
Catalog #: 000189243
F.S. Collins #s.n. 17 September 1911
Cosmarium margaritatum (P.Lundell) J.Roy & Bisset
United States, Rhode Island, Providence, Washington's Pond, Cranston

Yale University Herbarium
Catalog #: YU.095062
Frank Shipley Collins s.n. 17 September 1911
Cosmarium margaritatum (P.Lundell) J.Roy & Bisset
United States, Rhode Island, Washington's Pond, Cranston, RI