Erysiphe thesii
L. Junell
KW [Darwin] 12341. Place of collection: Ukraine; Donetsk oblast; Sloviansk district; Mayaki village (N48°57' E37°37'). Date of collection: 23 July 1977. Associated organism: Thesium arvense (leaf, stem). Collector: Heluta, V.P.. Identifier: Heluta, V.P..