Gilbert Wild had quite the rep for sending mislabeled peonies for quite a while, seem to have gotten better the last few years. I've found Hollingsworth and Adelman's responded quickly and helpfully with some I asked them about. I also had some that I got from Gilbert Wild that I couldn't ID, had the same results from them that you did. Maybe they're kinda gun shy in case you wanted to tell them they sent the wrong roots! Do you have any local growers in your area? I've managed to ID a few of mine by finding blooming ones for sale at a local nursery. Also ID'ed a couple (probably) when I went to the UofM peony garden 2 years ago. I took pics of those that I thought were possibles, close-ups of flowers and foliage, and compared when I got home.