Melampsoridium betulinum
Kleb.
KW [Darwin] 1895. Place of collection: Russia; Leningradskaya oblast; Oranienbaum (N59°55' E29°46'). Date of collection: 13 July 1928. Associated organism: Betula pendula (leaf). Collector: Anon. [phytopathology students]. Identifier: Anon. [phytopathology students].