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

Brown University - Algae
Catalog #: ABRU00003812
E. Butler s.n.
Spirulina major Kützing
Canada, Alberta, Banff, AB, Canada

Michigan State University Algae
Catalog #: MSC0184055
E. Butler #s.n. 00 June 1891
Phormidium inundatum Kützing ex Gomont
Canada, Alberta, Banff

Michigan State University Algae
Catalog #: MSC0184819
E. Butler #s.n. 00 June 1891
Spirulina major Kützing
Canada, Alberta, Warm Sulphur Springs, Banff

Miami University - Algae
Catalog #: 000188091
E. Butler #s.n. 00 June 1891
Spirulina major Kützing
Canada, Alberta, Warm Sulphur Springs, Banff

Rutgers University, Chrysler Herbarium - Macroalgae Collection
Catalog #: CHRB0012626
E. Butler #s.n. 00 July 1891
Spirulina major Kützing
Canada, Alberta, Banff

Yale University Herbarium
Catalog #: YU.092185
Eloise Butler s.n. 00 June 1891
Spirulina major Kützing
Canada, Alberta, Banff