fungus sponge on a tree stump, root sponge

hardwood forest details closeup growth bark striped abstract background texture natural nature sponge polypore mushroom fungus hub mushrooms edible shelf plant growing problem botanical polypous squamous wood cerioporus grow squamosus tree parasitism death cup topper toadstool wild macro brown trunk fungal infection botany dead poisonous parasitic ecology organic disease fungi environment outdoor stump root