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

Brown University - Algae
Catalog #: ABRU00004202
F. S. Collins s.n. 24 July 1907
Sphaerozosma vertebratum Brébisson ex Ralfs
United States, Massachusetts, Pine Hill Swamp, Medford, MA

University of Michigan
Catalog #: 736450
F.S. Collins #s.n. 24 July 1907
Sphaerozosma vertebratum Brébisson ex Ralfs
United States, Massachusetts, Middlesex, Pine Hill Swamp, Medford

University of Michigan
Catalog #: 736451
F.S. Collins #s.n. 24 July 1907
Sphaerozosma vertebratum Brébisson ex Ralfs
United States, Massachusetts, Middlesex, Pine Hill Swamp, Medford

Michigan State University Algae
Catalog #: MSC0184742
F.S. Collins #s.n. 24 July 1907
Sphaerozosma vertebratum Brébisson ex Ralfs
United States, Massachusetts, Middlesex, Pine Hill Swamp, Medford

Miami University - Algae
Catalog #: 000188537
F.S. Collins #s.n. 24 July 1907
Sphaerozosma vertebratum Brébisson ex Ralfs
United States, Massachusetts, Middlesex, Pine Hill Swamp, Medford

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00147192
a16d1542-f7bf-42b5-8b9b-d5a07fc76336
F.S. Collins #s.n. 24 July 1907
Sphaerozosma Corda ex Ralfs, 1848
United States, Massachusetts, Middlesex, Pine Hill Swamp, Medford

Yale University Herbarium
Catalog #: YU.094509
Frank Shipley Collins s.n. 24 July 1907
Sphaerozosma vertebratum Brébisson ex Ralfs
United States, Massachusetts, Middlesex, Medford; Pine Hill Swamp, Medford, MA