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

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.00723
s.n.
Sphaerotheca humuli (DC.) Burrill

USDA United States National Fungus Collections
Catalog #: BPI 948433
s.n.
Sphaerotheca humuli (DC.) Burrill
United States, California

University of Georgia, Julian H. Miller Mycological Herbarium
Catalog #: GAM00008894
E. B. Copeland s.n. 09 September 1944
Sphaerotheca humuli (DC.) Burrill
USA, California, Butte, Jonesville;

Field Museum of Natural History
Catalog #: C0286366F
50ed487e-bb6f-48a3-82de-75d7c558a577
E. B. Copeland #s.n. 09 September 1944
Sphaerotheca humuli (DC.) Burrill (DC.) Burrill
U.S.A., California, Butte, Jonesville; Jonesville

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0056017
E. B. Copeland #s.n. 09 September 1944
Sphaerotheca humuli (DC.) Burrill
United States, California, Butte, Jonesville;

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP30891
E.B. Copeland s.n. 09 September 1944
Sphaerotheca humuli (DC.) Burrill
United States, California, Butte, Jonesville

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0118872
E.B. Copeland #s.n. 09 September 1944
Sphaerotheca collomiae U. Braun
USA, California, Butte, Jonesville;