chondrostereum purpureum, saprotrophic fungus growing on a felled tree in the garden in autumn

chondrostereum purpureum fungus saprotrophic basidiomycota agaricomycetes agaricales cyphellaceae mycology mushroom disease pathogen tree garden autumn fall decay decomposer wood nature biodiversity ecology biology forestry parasite infection spore basidiomycete basidiocarp fruiting body bracket polypore shelf conk purple color texture morphology identification classification taxonomy species organism life cycle habitat