Bondarzewia berkeleyi
This example of Berkeley's polypore fruited in early September;
McCormick's Creek State Park, Owen county.  Growing at the base of a
very large oak tree (10 foot girth; probably over 100 years old).  This
fungus is a tree pathogen and likes to eat tree roots and wood at the
base of living trees.
See Bondarzewia berkeleyi at
Fungi Growing on Wood
Bondarzewia berkeleyi
Bondarzewia berkeleyi
Bondarzewia berkeleyi