Farlow, Anderson & Eaton, Algae Exs. Amer. Bor.
Farlow, W.G.; Anderson, C.L.; Eaton, D.C. [1 - 230]

Field Museum of Natural History
Catalog #: C0512894F
W. G. Farlow #s.n.
Ptilota pectinata (Gunnerus) Kjellman
United States, Maine, Washington, Eastport

University Herbarium, University of California, Berkeley
Catalog #: UC687911
W. G. Farlow #s.n.
Ptilota serrata Kützing
United States, Maine, Washington, Eastport

San Diego Natural History Museum
Catalog #: SD00006981
W. G. Farlow #s.n.
Ptilota gunneri P.C.Silva, Maggs & L.M.Irvine
United States, Maine, Washington, Eastport

University of Michigan
Catalog #: 670413
W.G. Farlow #s.n.
Ptilota serrata Kützing
United States, Maine, Washington, Eastport

Yale University Herbarium
Catalog #: YU.095669
William Gilson Farlow s.n.
Ptilota serrata Kützing
United States, Maine, Washington, Eastport; Eastport