Oidium sp.

KW [Darwin] 50979. Place of collection: Ukraine; Kiev oblast; Pereiaslav-Khmelnytskyi district; Studenyky village; yard of the forest office (N50°10' E31°33'). Date of collection: 13 June 1975. Associated organism: Viola tricolor (leaf). Collector: Berehova, V.P.. Identifier: Heluta, V.P..