Constantinescu & Negrean, Herb. Mycol. Roman.
O. Constantinescu ; G. Negrean [1851-3000]

Cornell University Plant Pathology Herbarium
Catalog #: Herb.Myc.Rom.2073
s.n.
Erysiphe R. Hedw. ex DC.

USDA United States National Fungus Collections
Catalog #: BPI 1019455
s.n.
Erysiphe heraclei DC.
Romania

Purdue University, Kriebel Herbarium
Catalog #: PUL00028586
G Negrean s.n. 14 September 1973
Erysiphe heraclei DC.
Romania, Prahova, Sinaia;