Migula, Krypt. Germ., Austr. Helv. Exs. [Pilze]
E.F.A.W. Migula [1-425]

Cornell University, Plant Pathology Herbarium
Catalog #: Mig.,C.G,A.H-0266
s.n.
Sphaerotheca

Michigan State University Herbarium
Catalog #: MSC0253273
W. Migula s.n. 00 August 1922
Sphaerotheca humuli (DC.) Burrill
Germany, Thuringia, Dankmarshausen; Werra on grasslands (Wiesen)

Academy of Natural Sciences of Drexel University
Catalog #: PH00315598
W. Migula #s.n 21 August 1922
Sphaerotheca humuli (DC) Burr.
Germany, Thuringen, Dankmarshausen