mushrooms grow inside a beech tree trunk in the forest in autumn.

sponge tree trunk nature natural mushroom fungus forest annular appressed autumn brown cap concolorous convex covered cuticle cylindrical dense dry ellipsoid evanescent fasciculate ferruginous fistulous fragrant odor gelatinous germination pore gills margins glutinous habitat hemispherical hymenophore immersed gluten involute margin light yellow mild flavor moist mushrooms oblong reddish scales slimy stem straw stumps thread widespread spores umbo color