Rhytisma umbonatum
(Hoppe ex Wallr.) Rabenh.
IMI 13135. Place of collection: Czech Republic; Moravia; near Weisskirchen, by River Becwa near Ribar. Date of collection: August 1940. Associated organism: Salix purpurea (leaf). Collector: Petrak, F.. Literature: page(s) Crypt. Exsiccatae a Mus. Hist. Nat. Vindobon. 3535.