Coleosporium petasitis ex Petasites hybridus

#Petasiteshybridus #Petasites #GewöhnlichePestwurz #butterbur #Grandpétasite #farfaracciomaggiore #Coleosporiumpetasitis #Coleosporium #Rustfungus #Rust #Rostpilz #Rost #Fungus #Phytopathology #FungiFriends #Nature