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

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.00568
s.n.
Sphaerotheca humuli var. humuli (DC.) Burrill
United States, California

Field Museum of Natural History
Catalog #: C0286349F
H.E. Parks and J.P. Tracy #11066 27 June 1934
Sphaerotheca humuli (DC.) Burrill
USA, California, Humboldt, Grouse Mountain

Washington State University, Charles Gardner Shaw Mycological Herbarium
Catalog #: WSP39805
H.E. Parks; J.P. Tracy s.n. 27 June 1934
Sphaerotheca humuli (DC.) Burrill
United States, California, Humboldt, Grouse Mountain

University of Georgia, Julian H. Miller Mycological Herbarium
Catalog #: GAM00008881
Harold E. Parks s.n. 27 June 1934
Sphaerotheca humuli (DC.) Burrill
USA, California, Humboldt, Grouse Mountain

University of Florida Herbarium
Catalog #: FLAS-F-25714
J. P. Tracy #11,066 27 June 1934
Sphaerotheca humuli (DC.) Burrill
United States, California, Humboldt, Grouse Mountain

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0056022
J. P. Tracy #11,066 27 June 1934
Sphaerotheca humuli (DC.) Burrill
United States, California, Humboldt, Grouse Mountain

University of Cincinnati, Margaret H. Fulford Herbarium
Catalog #: CINC-F-0000900
Parks, H.E. #11066 27 June 1934
Sphaerotheca humuli (DC.) Burrill
United States, California, Humboldt, Grouse Mountain