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

Cornell University, Plant Pathology Herbarium
Catalog #: CaliforniaF.01416
s.n.
Sphaerotheca humuli (DC.) Burrill

University of Illinois, Illinois Natural History Survey Fungarium
Catalog #: ILLS00170715
Lee Bonar #s.n. 15 August 1973
Sphaerotheca humuli (DC.) Burrill
United States, California, Alameda, Botanical Garden, Strawberry Canyon. University of California, Berkeley.