It looks like it's in the polypore family to me. I'll have to dig out the book. I've been collecting edible mushrooms most of my adult life. I'll say I would not eat it until I saw someone else eat it and they were alive the next day. My guess , not poison, but not desirable. I've seen it in the woods. Hard as a hockey puck? There are too many easy to identify shroons to that are delightful to eat than to go after the questionable. Picked a chicken of the woods last night.(sulphur polypore).