USDA United States National Fungus Collections
Catalog #: BPI 994869
s.n.
Erysiphe communis var. urticearum Westend.

USDA United States National Fungus Collections
Catalog #: BPI 995405
s.n.
Erysiphe communis (Wallr.) Schltdl.

USDA United States National Fungus Collections
Catalog #: BPI 553541
Fiedler s.n.
Uncinula bivonae Lév.
Germany, Doemitz