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

Brown University - Algae
Catalog #: ABRU00004514
N. L. Gardner s.n.
Pteridium serratum f. platyphyllum Setchell & N.L.Gardner
United States, Washington, Port Defiance, Tacoma, WA

Michigan State University Algae
Catalog #: MSC0173933
N. L. Gardner s.n. 00 May 1910
Pteridium serratum f. platyphyllum Setchell & N.L.Gardner
United States, Washington, Port Defiance, Tacoma, WA

Field Museum of Natural History
Catalog #: C0507724F
N. L. Gardner #s.n. 00 May 1910
Pteridium serratum f. platyphyllum Setchell & N.L.Gardner
United States, Washington, Tacoma, Point Defiance, Tacoma

University of Michigan
Catalog #: 662947
N.L. Gardner #s.n. 00 May 1910
Membranoptera platyphylla (Setchell & N.L.Gardner) Kylin
United States, Washington, Pierce, Port Defiance, Tacoma

Miami University - Algae
Catalog #: 000210594
N.L. Gardner #s.n. 00 May 1910
Pteridium serratum f. platyphyllum Setchell & N.L.Gardner
United States, Washington, Pierce, Port Defiance, Tacoma

Yale University Herbarium
Catalog #: YU.094985
Nathaniel Lyon Gardner s.n.
Pteridium serratum
United States, Washington, Tacoma; Port Defiance, Tacoma, WA