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

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.00724
s.n.
Sphaerotheca humuli (DC.) Burrill

USDA United States National Fungus Collections
Catalog #: BPI 948434
s.n.
Sphaerotheca humuli (DC.) Burrill
United States, California

University of Florida Herbarium
Catalog #: FLAS-F-41914
H. E. Parks #11511 28 August 1941
Sphaerotheca humuli (DC.) Burrill
United States, California, Trinity, Lemonade Springs, South Fork Moutain

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0056024
H. E. Parks #11511 28 August 1941
Sphaerotheca humuli (DC.) Burrill
United States, California, Trinity, Lemonade Springs, South Fork Moutain

Field Museum of Natural History
Catalog #: C0286352F
b7aeec65-753a-498b-a8e2-b6568f1178c9
H. E. Parks & J. P. Tracy #11511 28 August 1941
Sphaerotheca humuli (DC.) Burrill (DC.) Burrill
U.S.A., California, Trinity, South Fork Mountain, "Lemonade Springs"

Iowa State University, Ada Hayden Herbarium
Catalog #: ISC-F-0118983
H.E. Parks #11511 28 August 1941
Sphaerotheca fusca (Fr.) S. Blumer
USA, California, Trinity, Lemonade Springs, South Fork Mountain

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP30890
H.E. Parks; J.P. Tracy s.n. 28 August 1941
Spaerotheca humuli
United States, California, Trinity, Lemonade Springs, South Fork Mountain

University of Georgia, Julian H. Miller Mycological Herbarium
Catalog #: GAM00008892
Harold E. Parks s.n. 28 August 1941
Sphaerotheca humuli (DC.) Burrill
USA, California, Trinity, Lemonade Springs South Fork Mountain