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

Brown University - Algae
Catalog #: ABRU00003078
I. Holden s.n. 23 May 1897
Enteromorpha intestinalis (Linnaeus) Nees
United States, Connecticut, Seaside Park, Bridgeport, CT

Field Museum of Natural History
Catalog #: C0525936F
I. Holden #s.n. 23 May 1897
Enteromorpha intestinalis f. cylindracea J.Agardh
United States, Connecticut, Fairfield, Seaside Park, Bridgeport

Yale University Herbarium
Catalog #: YU.091547
Isaac Holden s.n. 23 May 1897
Enteromorpha intestinalis (Linnaeus) Nees
United States, Connecticut, Seaside Park, Bridgeport, CT

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00212834
8a1a72d2-852f-4c8d-9405-600889c27a22
Isaac Holden #465 23 May 1897
Ulva intestinalis Linnaeus
United States, Connecticut, Fairfield, Seaside Park, Bridgeport

University of Michigan
Catalog #: 727892
Isaac Holden #s.n. 23 May 1897
Enteromorpha intestinalis f. cylindracea J.Agardh
United States, Connecticut, Fairfield, Seaside Park, Bridgeport

University of Michigan
Catalog #: 734458
Isaac Holden #s.n. 23 May 1897
Ulva intestinalis Linnaeus
United States, Connecticut, Fairfield, Seaside Park, Bridgeport

Michigan State University Algae
Catalog #: MSC0185173
Isaac Holden #s.n. 23 May 1897
Ulva intestinalis Linnaeus
United States, Connecticut, Fairfield, Seaside Park, Bridgeport

Miami University - Algae
Catalog #: 000186869
Isaac Holden #s.n. 23 May 1897
Enteromorpha intestinalis (Linnaeus) Nees
United States, Connecticut, Fairfield, Seaside Park, Bridgeport