KWOOLD

Thanks. Have looked at that is very informative. Now for the dissection!!!

Thanks for your help. If I am to cut a section, what would be the particular differences that I should look for to differentiate between the two?

This fungus is growing on the base of an ash tree, which is about 1m diam x30metres tall. It is adjacent to a walkway and a house. The fungus is quite hard and the larger section is about 1 ft across. Could anyone help me to identify it, and whether it has implications on the stability of the tree? I wonder whether it could be Perreniporia fraxinea? The tree has been in leaf during the summer.