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

Brown University - Algae
Catalog #: ABRU00003250
De A. Saunders s.n.
Enteromorpha prolifera (O.F.Müller) J.Agardh
United States, South Dakota, South Dakota

Michigan State University Algae
Catalog #: MSC0185194
De A. Saunders #s.n.
Ulva prolifera O.F.Müller
United States, South Dakota, [No precise loc]

Yale University Herbarium
Catalog #: YU.106537
De Alton Saunders s.n.
Enteromorpha prolifera (O.F.Müller) J.Agardh
United States, South Dakota, South Dakota

University of Michigan
Catalog #: 735015
S.P. Monks #s.n.
Ulva prolifera O.F.Müller
United States, South Dakota, [No precise loc]

University of Michigan
Catalog #: 735018
S.P. Monks #s.n.
Ulva prolifera O.F.Müller
United States, South Dakota, [No precise loc]

Miami University - Algae
Catalog #: 000210414
S.P. Monks #s.n.
Enteromorpha prolifera (O.F.Müller) J.Agardh
United States, South Dakota, [No precise loc]