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

Brown University - Algae
Catalog #: ABRU00003531
W. A. Setchell s.n. 04 June 1900
Pleurocapsa caldaria
United States, California, Sonoma, Devil's Kitchen, Geysers, CA

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0012557
W. A. Setchell #851 04 June 1900
Pleurocapsa caldaria
United States, California, Sonoma, Geysers; Devil's Kitchen, Geysers, CA; 40.500644 -121.419895

University of Michigan
Catalog #: 1306622
W.A. Setchell #7709 04 June 1900
Pleurocapsa caldaria
United States, California, Sonoma, Above the "Devil's Kitchen," Geysers

Michigan State University Algae
Catalog #: MSC0182290
W.A. Setchell #7709 04 June 1900
Cyanidium caldarium (Tilden) Geitler
United States, California, Sonoma, Above the "Devil's Kitchen," Geysers

Miami University - Algae
Catalog #: 000187487
W.A. Setchell #7709 04 June 1900
Pleurocapsa caldaria
United States, California, Sonoma, Above the "Devil's Kitchen," Geysers

Yale University Herbarium
Catalog #: YU.091934
William Albert Setchell s.n. 04 June 1900
Pleurocapsa caldaria Setchell
United States, California, Sonoma, Devil's Kitchen, Geysers, CA