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

University of Wisconsin-Madison Herbarium
Catalog #: WIS-F-0056033
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 #: C0286360F
H.E. Parks #s.n. 00 July 1924
Sphaerotheca humuli (DC.) Burrill
USA, California, Alameda, Berkeley, University of California Botanical Garden