Phylum: Basidiomycota Family: Bondarzewiaceae
Heterobasidion annosum (Fr.) Bref.
A common and pernicious pathogen of conifers, causing much destruction in commercial plantations. It produces quite large basidiocarps which are white with a reddish-brown pileus
Ryvarden & Melo (2014) Poroid Fungi of Europe
Læssøe & Petersen (2019) Fungi of Temperate Europe, Volume 2