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

Brown University - Algae
Catalog #: ABRU00004270
I. Holden s.n.
Cladophora flexuosa (O.F.Müller) Kützing
United States, Connecticut, Bridgeport, CT

Drexel University, Academy of Natural Sciences - Algae
Catalog #: PH00204887
faa00196-0d49-4e97-b42f-d48112d35cab
I. Holden #s.n.
Cladophora gracilis (Griffiths) K
United States, Connecticut, Fairfield, Bridgeport

Yale University Herbarium
Catalog #: YU.094577
Isaac Holden s.n.
Cladophora flexuosa (O.F.Müller) Kützing
United States, Connecticut, Fairfield, Bridgeport; Bridgeport, CT

Field Museum of Natural History
Catalog #: C0530075F
Isaac Holden #s.n.
Cladophora gracilis f. subflexuosa F.S.Collins
United States, Connecticut, Fairfield, Bridgeport

University of Michigan
Catalog #: 684085
Isaac Holden #s.n.
Cladophora sericea (Hudson) Kützing
United States, Connecticut, Bridgeport

University of Michigan
Catalog #: 684664
Isaac Holden #s.n.
Cladophora flexuosa (O.F.Müller) Kützing
United States, Connecticut, Fairfield, Bridgeport

Michigan State University Algae
Catalog #: MSC0181894
Isaac Holden #s.n.
Cladophora flexuosa (O.F.Müller) Kützing
United States, Connecticut, Fairfield, Bridgeport

Miami University - Algae
Catalog #: 000188658
Isaac Holden #s.n. 22 August 2015
Cladophora flexuosa (O.F.Müller) Kützing
United States, Connecticut, Fairfield, Bridgeport