Kyle P Lamb

Hello all, new here. Just found some what I think are Ganoderma tsugae or hemlock varnish shelf on an old hemlock stump in Southern Ontario, Canada. Was hoping to dry and use them in teas and tinctures but just curious about their undersides. One is whiteish grey and the other looks a little moldy. The insides seem ok still. Any advice on whether they’re still usable? Thanks!