Anonymous, Calif. Fungi
Herbarium of the University of California. [1- ? 1425]

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.00295
s.n.
Sphaerotheca humuli (DC.) Burrill

USDA United States National Fungus Collections
Catalog #: BPI 948004
s.n.
Sphaerotheca humuli (DC.) Burrill
United States, California

Michigan State University Herbarium
Catalog #: MSC0212937
H. E. Parks s.n. 00 July 1924
Sphaerotheca humuli (DC.) Burrill
United States, California, Alameda, Berkeley; Botany Garden, University of California.

University of Nebraska State Museum, C.E. Bessey Herbarium
Catalog #: NEB00081127
H. E. Parks s.n. 00 July 1924
Sphaerotheca humuli (DC.) Burrill
United States, California, Alameda, Berkeley; Botany Garden, University of California

Field Museum of Natural History
Catalog #: C0286359F
57fd75aa-2e9f-41c2-87c8-d334ac60b3e5
H. E. Parks #s.n. 00 July 1924
Sphaerotheca humuli (DC.) Burrill (DC.) Burrill
U.S.A., California, Alameda, Berkeley; Berkeley, University of California Botanical Garden

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0056025
H. E. Parks #s.n. 00 July 1924
Sphaerotheca humuli (DC.) Burrill
United States, California, Alameda, Berkeley; Botany Garden, University of California

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP11513
H.E. Parks s.n. 00 July 1924
Sphaerotheca humuli (DC.) Burrill
United States, California, Alameda, Botany Garden, University of California, Berkeley

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0118869
H.E. Parks #s.n. 00 July 1924
Sphaerotheca collomiae U. Braun
USA, California, Alameda, Berkeley; Botany Garden, University of California

University of Georgia, Julian H. Miller Mycological Herbarium
Catalog #: GAM00008885
Harold E. Parks s.n. 00 July 1924
Sphaerotheca humuli (DC.) Burrill
USA, California, Alameda, Berkeley; Botany Garden University of California