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

Brown University - Algae
Catalog #: ABRU00002791
I. Holden s.n.
Ascophyllum mackayi (Turner) Holmes & Batters
United States, Connecticut, Bridgeport, CT

Field Museum of Natural History
Catalog #: C0521127F
I. Holden #s.n.
Ascophyllum mackayi (Turner) Holmes & Batters
United States, Connecticut, Bridgeport

Yale University Herbarium
Catalog #: YU.091257
Isaac Holden s.n. 00 April 1895
Ascophyllum mackayi (Turner) Holmes & Batters
United States, Connecticut, Fairfield, Bridgeport; Bridgeport, CT

University of Michigan
Catalog #: 612646
Isaac Holden #s.n. 00 April 1895
Ascophyllum nodosum (Linnaeus) Le Jolis
United States, Connecticut, Fairfield, Bridgeport

University of Michigan
Catalog #: 612670
Isaac Holden #s.n. 00 April 1895
Ascophyllum nodosum (Linnaeus) Le Jolis
United States, Connecticut, Fairfield, Bridgeport

Michigan State University Algae
Catalog #: MSC0181272
Isaac Holden #s.n. 00 April 1895
Ascophyllum nodosum (Linnaeus) Le Jolis
United States, Connecticut, Fairfield, Bridgeport

Miami University - Algae
Catalog #: 000186576
Isaac Holden #s.n. 00 April 1895
Ascophyllum mackaii
United States, Connecticut, Fairfield, Bridgeport

University Herbarium, University of California, Berkeley
Catalog #: UC1829194
Isaac Holden #s.n.
Ascophyllum mackayi (Turner) Holmes & Batters
United States, Connecticut, Fairfield, Bridgeport