Constantinescu & Negrean, Herb. Mycol. Roman.O. Constantinescu ; G. Negrean [1851-3000]
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Cornell University Plant Pathology Herbarium
Catalog #: Herb.Myc.Rom.2076
s.n.
Erysiphe R. Hedw. ex DC.
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USDA United States National Fungus Collections
Catalog #: BPI 1019458
s.n.
Erysiphe knautiae Duby
Romania
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Purdue University, Kriebel Herbarium
Catalog #: PUL00028589
G Negrean s.n. 28 September 1972
Erysiphe knautiae Duby
Romania, Maramures, Baia Mare;
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