W.B. Cooke [1-450]

Cornell University, Plant Pathology Herbarium
Catalog #: WBC,Myc.N.A.0023
s.n.
Sphaerotheca

USDA United States National Fungus Collections
Catalog #: BPI 952617
s.n.
Sphaerotheca humuli (DC.) Burrill
United States

University of Wyoming, Wilhelm G. Solheim Mycological Herbarium
Catalog #: RMS0024498
13415 #s.n. 24 August 1939
Sphaerotheca humuli (DC.) Burrill
United States, California, along Squaw Valley Creek

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP21134
unknown s.n. 24 August 1939
Sphaerotheca humuli (DC.) Burrill
United States, California, along Squaw Valley Creek

University of Michigan Herbarium
Catalog #: 309400
W. B. Cooke #13415 24 August 1939
Sphaerotheca humuli var. fuliginea (Schltdl.) E.S. Salmon
USA, California, Siskiyou, Mount Shasta.