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

Brown University - Algae
Catalog #: ABRU00003687
E. Butler s.n.
Plocamium pacificum Kylin
Canada, British Columbia, Minnesota Seaside Station, Vancouver Island, BC, Canada

Yale University Herbarium
Catalog #: YU.106590
Eloise Butler s.n.
Plocamium coccineum Lyngbye
Canada, British Columbia, Minnesota Seaside Station, Vancouver Island

University of Michigan
Catalog #: 667062
Eloise Butler #s.n. 00 July 1901
Plocamium pacificum Kylin
Canada, British Columbia, Minnesota Seaside Station, Vancouver Island

Miami University - Algae
Catalog #: 000187970
Eloise Butler #s.n. 00 July 1901
Plocamium pacificum Kylin
Canada, British Columbia, Minnesota Seaside Station, Vancouver Island

Michigan State University Algae
Catalog #: MSC0184385
J.M. Polley #s.n. 00 July 1901
Plocamium pacificum Kylin
Canada, British Columbia, Minnesota Seaside Station, Vancouver Island