C. Roumeguere [1-7400]
Cornell University Plant Pathology Herbarium
Catalog #: Roum.,F.Gallici-1380
s.n.
Erysiphe R. Hedw. ex DC.
France
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USDA United States National Fungus Collections
s.n.
Erysiphe horridula f. ulmariae
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University of Illinois Herbarium
Letendre s.n. 00 June 1880
Erysiphe horridula f. ulmariae
France, (Siene Inférieur), Prairie du Équevilley,
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