irpex lacteus white-rot fungus on dead cherry tree

agaricomycetes bark basidiomycota biology cherry close closeup common crust crusty dead decay decompose decomposition deteriorate deterioration edges fungi fungus hydnoid irpex jagged lacteus layer macro mycology organism polyporales polypore protrusion raised rot rotten rotting rough saprophyte saprophytic spiky steccherinaceae tan teeth texture tooth tree view white whiterot wood woodrotting