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

Brown University - Algae
Catalog #: ABRU00003896
W. J. V. Osterhout s.n.
Enteromorpha intestinalis (Linnaeus) Nees
United States, California, San Francisco, CA

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00212833
fa588bc5-9195-496f-97e0-04c45348e9ec
W. J. V. Osterhout; N. L. Gardner #1182
Ulva intestinalis Linnaeus
United States, California, San Francisco, San Francisco

University of Michigan
Catalog #: 734546
W.J.V. Osterhout #s.n.
Ulva intestinalis Linnaeus
United States, California, San Francisco, San Francisco

University of Michigan
Catalog #: 734564
W.J.V. Osterhout #s.n.
Ulva intestinalis Linnaeus
United States, California, San Francisco, San Francisco

Michigan State University Algae
Catalog #: MSC0185172
W.J.V. Osterhout #s.n.
Ulva intestinalis Linnaeus
United States, California, San Francisco, San Francisco

Miami University - Algae
Catalog #: 000188176
W.J.V. Osterhout #s.n. 22 August 2015
Ulva intestinalis Linnaeus
United States, California, San Francisco, San Francisco

Yale University Herbarium
Catalog #: YU.094137
Winthrop John Vanleuven Osterhout s.n.
Enteromorpha intestinalis (Linnaeus) Nees
United States, California, San Francisco, CA