G. applanatum

is the most common European species known as the “artists fungus ” (Sokół, 2000; Ryvarden, Melo, 2014). It grows mostly in forests (Kotlaba, 1984; Sokół, 2000; Papp, Szabó, 2013) and rarely in urban areas (Gáperová, 2001). In Europe, it was recorded on 35 genera of trees (Breitenbach, Kränzlin, 1986; Bernicchia, 2005; Ryvarden, Melo, 2014).