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

Brown University - Algae
Catalog #: ABRU00003769
F. S. Collins s.n. 28 April 1903
Conferva utriculosa Kützing
United States, Massachusetts, Medford, MA

University of Michigan
Catalog #: 736970
F.S. Collins #s.n. 28 March 1903
Tribonema utriculosum (Kützing) Hazen
United States, Massachusetts, Middlesex, Medford

University of Michigan
Catalog #: 736973
F.S. Collins #s.n. 28 March 1903
Tribonema utriculosum (Kützing) Hazen
United States, Massachusetts, Middlesex, Medford

Michigan State University Algae
Catalog #: MSC0182168
F.S. Collins #s.n. 28 April 1903
Conferva utriculosa Kützing
United States, Massachusetts, Middlesex, Medford

Yale University Herbarium
Catalog #: YU.106595
Frank Shipley Collins s.n. 28 April 1903
Conferva utriculosa Kützing
United States, Massachusetts, Middlesex, Medford; Medford, MA