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

Brown University - Algae
Catalog #: ABRU00003290
H. T. A. Hus s.n. 30 May 1899
Ptilota filicina J.Agardh
United States, California, Fort Point, San Francisco, CA

Field Museum of Natural History
Catalog #: C0516311F
H. T. A. Hus #s.n. 30 May 1899
Ptilota filicina J.Agardh
United States, California, San Francisco, Fort Point, San Francisco

Michigan State University Algae
Catalog #: MSC0184374
H.T.A. Hus #s.n. 30 May 1899
Ptilota filicina J.Agardh
United States, California, San Francisco, Fort Point

Miami University - Algae
Catalog #: 000187187
H.T.A. Hus #s.n. 30 May 1899
Ptilota filicina J.Agardh
United States, California, San Francisco, Fort Point, San Francisco

Yale University Herbarium
Catalog #: YU.106544
Henri Hus s.n. 30 May 1899
Ptilota filicina J.Agardh
United States, California, San Francisco; Fort Point, San Francisco, CA