C. Roumeguere [1-7400]

USDA United States National Fungus Collections
Catalog #: BPI 1013883
s.n.
Erysiphe communis (Wallr.) Schltdl.

University of Illinois Herbarium
Catalog #: ILL00221443
F. Fautrey #s.n.
Erysiphe communis f. calthae