C. Roumeguere [1-7400]

USDA United States National Fungus Collections
Catalog #: BPI 1014858
s.n.
Erysiphe horridula (Wallr.) Rabenh.

USDA United States National Fungus Collections
Catalog #: BPI 1010398
s.n.
Erysiphe horridula (Wallr.) Rabenh.

University of Illinois Herbarium
Catalog #: ILL00216840
(Reliquae Westendorpii) s.n.
Erysiphe horridula forma symphiti
Belgique, Bruxelles,