These photos came from Two different Oak Trees that were photographed on the same day in Autumn, I took a small slice home and fried it up for breakfast, very tasty. The Laetiporus sulphureus sometimes referred to as Polyporus sulphureus grows in the old heartwood of big old trees, and is one of the natural processes that hollow out big Trees enabling the Tree to retain it's flexibility in the face of strong winds, thereby increasing the chances of surviving to a very old age. This survival strategy ( does the Tree allow itself to become infected or does it take advantage of a Fungal infection that it can't prevent ) is a trial that all old Trees have to navigate and if they are succesful they go on to become the very old hollow trees we all know of.