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

Brown University - Algae
Catalog #: ABRU00003632
W. A. Setchell s.n. 21 August 1899
Ceratothamnion pikeanum (Harvey) J.Agardh
United States, Alaska, Harvester Island, Uyak Bay, AK

University of Michigan
Catalog #: 644533
W.A. Setchell #943 21 August 1899
Callithamnion pikeanum var. laxum (Setchell & N.L.Gardner) Doty
United States, Alaska, Harvester Island, Uyak Bay

Miami University - Algae
Catalog #: 000187609
W.A. Setchell #943 21 August 1899
Ceratothamnion pikeanum (Harvey) J.Agardh
United States, Alaska, Harvester Island, Uyak Bay

University of Michigan
Catalog #: 644534
W.A. Setchell #s.n. 21 August 1899
Callithamnion pikeanum var. laxum (Setchell & N.L.Gardner) Doty
United States, Alaska, Harvester Island, Uyak Bay

University of Michigan
Catalog #: 644536
W.A. Setchell #s.n. 21 August 1899
Callithamnion pikeanum var. laxum (Setchell & N.L.Gardner) Doty
United States, Alaska, Harvester Island, Uyak Bay

Field Museum of Natural History
Catalog #: C0514547F
W.A. Setchell #s.n. 21 August 1899
Callithamnion pikeanum Harvey
United States, Alaska, Harvester Island, Uyak Bay

Field Museum of Natural History
Catalog #: C0515748F
W.A. Setchell #s.n. 21 August 1899
Ceratothamnion pikeanum f. laxum W.A.Setchell & N.L.Gardner
United States, Alaska, Kodiak Island, Harvester Island, Uyak Bay

Michigan State University Algae
Catalog #: MSC0181470
W.A. Setchell #s.n. 21 August 1899
Callithamnion pikeanum Harvey
United States, Alaska, Harvester Island, Uyak Bay

Yale University Herbarium
Catalog #: YU.092026
William Albert Setchell s.n. 21 August 1899
Ceratothamnion pikeanum (Harvey) J.Agardh
United States, Alaska, Harvester Island, Uyak Bay, AK