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

Brown University - Algae
Catalog #: ABRU00004198
F. S. Collins s.n. 19 August 1907
Cosmarium ovale Ralfs ex Ralfs
United States, Massachusetts, Pine Hill Swamp, Medford, MA

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00142669
e0278589-de6b-4c2f-9153-9ae6d97fdf6e
F. S. Collins #s.n. 19 August 1907
Cosmarium ovale Ralfs ex Ralfs
United States, Massachusetts, Pine Hill Swamp, Medford, MA

University of Michigan
Catalog #: 736142
F.S. Collins #s.n. 19 August 1907
Cosmarium ovale Ralfs ex Ralfs
United States, Massachusetts, Middlesex, Pine Hill Swamp, Medford

University of Michigan
Catalog #: 736144
F.S. Collins #s.n. 19 August 1907
Cosmarium ovale Ralfs ex Ralfs
United States, Massachusetts, Middlesex, Pine Hill Swamp, Medford

Michigan State University Algae
Catalog #: MSC0182216
F.S. Collins #s.n. 19 August 1907
Cosmarium ovale Ralfs ex Ralfs
United States, Massachusetts, Middlesex, Pine Hill Swamp, Medford

Miami University - Algae
Catalog #: 000188533
F.S. Collins #s.n.
Cosmarium ovale Ralfs ex Ralfs
United States, Massachusetts, Middlesex, Pine Hill Swamp, Medford

Yale University Herbarium
Catalog #: YU.094505
Frank Shipley Collins s.n. 19 August 1907
Cosmarium ovale Ralfs ex Ralfs
United States, Massachusetts, Middlesex, Medford; Pine Hill Swamp, Medford, MA