Fringed Polypore/Voorjaarshoutzwam

http://www.pilzfotopage.de/Aphyllos/slides/Polyporus_ciliatus.html Here is a link where the very finely pored hymenium is visible aswell as the very thin flesh.

Randy, the local mushroomingclub and I have been following the decay and the changes in biodiversity of the tree it is growing on since it fell in 2001. This mushroom has grown on the mulchy branches for 5+ years now. Plus I've been mushrooming since I was 4 years of age, and this mushroom is fairly common. Why are you so certain it is not a Polyporus? It does have pores as a hymenium, but it is attached to the (leathery) flesh of the cap, rather than the 'peelable' sponge a Boletus (or any other boletoid genus) has.