Microstroma album
(Desm.) Sacc.
Isikov 6535. Place of collection: Ukraine; Republic of Crimea; Parkovoye; Zhukovka, park (N44°24' E33°55', alt. 0030 m). Date of collection: 15 September 1990. Associated organism: Quercus pubescens (leaf). Collector: Isikov, V.P..