Beatnik I went back out to check the tree it was a white oak. I downloaded a better picture of the tree and a closer picture of the mushroom, it is the size of a softball. The petals just seem too small to be a black staining polypore, but it does look black where a fungus or something is attacking it. Also trahn I was doing some research on what I said looked like what you had. I don't think they are the same, my mistake.