Erysiphe polygoni
DC.
KW [Darwin] 12338. Place of collection: Ukraine; Luhansk Oblast; Milove District; Striletskyi Steppe reserve (N49°14' E40°05'). Date of collection: 17 September 1954. Associated organism: Rumex sp. (leaf). Collector: Morochkovsky, S.F.. Identifier: Heluta, V.P..