Rhytisma umbonatum
(Hoppe ex Wallr.) Rabenh.
IMI 32802. Place of collection: Czech Republic; Moravia; near Weisskirchen, by River Becwa. Date of collection: October 1925. Associated organism: Salix purpurea (leaf). Collector: Petrak, F.. Literature: page(s) F. Petrak, Mycotheca Generalis 1263.