snow on a mushroom, phellinus robustus - saprophytic wood fungus on an old oak tree stump, ukraine

agaricomycetes basidiomycete basidiospores biodiversity bracketfungus brownrot cap cellulose decay decayresistant decomposer decomposition ecosystem fomitiporia robusta fungal fungus habitat hardwood hymenochaetaceae hymenochaetales hyphae lignicolous mycelium mycology nutrientcycle oak perennial phaeolus phellinus robustus polypore pore resilience rot saprophyte saprotroph soil spore sporocarp stump substrate tree trunk wood woodland