Rhytisma umbonatum
(Hoppe ex Wallr.) Rabenh.
LE 171168. Place of collection: Russia; Orenburgskaya oblast; Buzuluk reservation; Borovka river, bank (N53°00' E52°10'). Date of collection: 29 September 1938. Associated organism: Salix caspica (leaf). Collector: Ontchukova-Bulavkina, A.. Identifier: Minter, D.W..