Quercus pubescens
"Exsudoporus permagnificus" is rare throughout Europe and listed as a vulnerable or endangered species in a number of regional and national checklists. It forms ectomycorrhizal associations with oaks ("Quercus"), particularly "Quercus suber", "Quercus ilex", "Quercus pubescens", "Quercus alnifolia", "Quercus pyrenaica" and less often with sweet chestnut ("Castanea sativa").