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

Brown University - Algae
Catalog #: ABRU00003813
W. J. V. Osterhout s.n. 17 July 1900
Spirulina subtilissima Kützing
United States, California, Contra Costa, Mount Diablo, CA

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0012631
W. J. V. Osterhout #1103 17 July 1900
Spirulina subtilissima Kützing
United States, California, Contra Costa, Mt Diablo

Field Museum of Natural History
Catalog #: C0575950F
W.J.V. Osterhout #s.n. 17 July 1900
Spirulina subtilissima Kützing
United States, California, Conta Costa, Mt. Diablo

Michigan State University Algae
Catalog #: MSC0184825
W.J.V. Osterhout #s.n. 17 July 1900
Spirulina subtilissima Kützing
United States, California, Contra Costa, Mount Diablo

Miami University - Algae
Catalog #: 000188092
W.J.V. Osterhout #s.n.
Spirulina subtilissima Kützing
United States, California, Contra Costa, Mount Diablo

Yale University Herbarium
Catalog #: YU.092186
Winthrop John Vanleuven Osterhout s.n. 17 July 1900
Spirulina subtilissima Kützing
United States, California, Contra Costa, Mount Diablo, CA