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

Brown University - Algae
Catalog #: ABRU00004570
N. L. Gardner s.n.
Pterothamnion plumula (J.Ellis) Nägeli
United States, Washington, near Friday Harbor, San Juan Island, WA

Field Museum of Natural History
Catalog #: C0516252F
N. L. Gardner #s.n. 00 July 1910
Pterothamnion plumula (J.Ellis) Nägeli
United States, Washington, San Juan, Friday Harbor

University of Michigan
Catalog #: 657954
N.L. Gardner #s.n. 00 July 1910
Herposiphonia grandis Kylin
United States, Washington, San Juan, Friday Harbor

University of Michigan
Catalog #: 657960
N.L. Gardner #s.n. 00 July 1910
Herposiphonia grandis Kylin
United States, Washington, San Juan, Friday Harbor

Michigan State University Algae
Catalog #: MSC0183013
N.L. Gardner #s.n. 00 July 1910
Herposiphonia plumula (J.Agardh) Falkenberg
United States, Washington, San Juan, Friday Harbor

Miami University - Algae
Catalog #: 000189173
N.L. Gardner #s.n. 00 July 1910
Herposiphonia plumula (J.Agardh) Falkenberg
United States, Washington, San Juan, Friday Harbor

Yale University Herbarium
Catalog #: YU.095041
Nathaniel Lyon Gardner s.n.
Pterothamnion plumula (J.Ellis) Nägeli
United States, Washington, near Friday Harbor, San Juan Island, WA