Erysiphe polygoni
DC.
KW [Darwin] 12227. Place of collection: Ukraine; Donetsk Oblast; Kamiani Mohyly reserve (N47°18' E37°05'). Date of collection: 27 September 1954. Associated organism: Polygonum lapathifolium (leaf). Collector: Morochkovsky, S.F.. Identifier: Heluta, V.P..