postia rennyi - a thin layer of white fungus on the trunk of an old cherry, destroying the wood

agaricomycetes basidiomycetes basidiomycota biodiversity biology branch cherry colony decay decomposition dikarya ecological ecology ecosystem environment europe fomitopsidaceae forest fungal fungi fungus genus growth habitat hyphae infestation microbe mushrooms mycelium mycology nature organism phytopathology polyporaceae polyporales postia rennyi saprotroph species spores substrate thin tree trunk ukraine white wood woody