Erysiphe polygoni
DC.
KW [Darwin] 12306. Place of collection: Ukraine; Kyiv Oblast; Borodianka District; Myrcha village (N50°44' E29°49'). Date of collection: 25 August 1983. Associated organism: Rumex acetosella (leaf, petiole). Collector: Heluta, V.P.. Identifier: Heluta, V.P..