G.L. Rabenhorst [1-2600]

Cornell University Plant Pathology Herbarium
Catalog #: F.europaei-1062
s.n.
Erysiphe communis f. knautiae Jacz.

USDA United States National Fungus Collections
Catalog #: BPI 996003
s.n.
Erysiphe communis (Wallr.) Schltdl.