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

Brown University - Algae
Catalog #: ABRU00003088
I. Holden s.n. 16 May 1897
Enteromorpha prolifera (O.F.Müller) J.Agardh
United States, Connecticut, Fresh Pond, Stratford, CT

Field Museum of Natural History
Catalog #: C0526334F
I. Holden #s.n. 16 May 1897
Enteromorpha prolifera (O.F.Müller) J.Agardh
United States, Connecticut, Fairfield, "Fresh Pond", Stratford

Miami University - Algae
Catalog #: 000186877
I. Holden #s.n. 19 May 1897
Enteromorpha prolifera (O.F.Müller) J.Agardh
United States, Connecticut, Fairfield, Fresh Pond, Stratfort

Yale University Herbarium
Catalog #: YU.106512
Isaac Holden s.n. 16 May 1897
Enteromorpha prolifera (O.F.Müller) J.Agardh
United States, Connecticut, Fairfield, Stratford; Fresh Pond, Stratford, CT

University of Michigan
Catalog #: 735056
Isaac Holden #s.n. 19 May 1897
Ulva prolifera O.F.Müller
United States, Connecticut, Fairfield, Fresh Pond, Stratfort

University of Michigan
Catalog #: 735060
Isaac Holden #s.n. 19 May 1897
Ulva prolifera O.F.Müller
United States, Connecticut, Fairfield, Fresh Pond, Stratfort

Michigan State University Algae
Catalog #: MSC0185191
Isaac Holden #s.n. 16 May 1897
Ulva prolifera O.F.Müller
United States, Connecticut, Fairfield, Fresh Pond, Stratford