inedible lamellar mushroom on the bark of an old tree, ukraine

inedible lamellar mushroom bark old tree ukraine fungus gills nonedible toadstool forest woodland mycology basidiomycota agaricomycetes agaricales saprotrophic decay decomposition wood autumn nature wild ecology biodiversity species identification spore cap stalk poisonous toxic hazardous dangerous caution warning habitat ecosystem landscape plant mushrooms auricularia mesenterica flora