I've got a species of tree that I can't identify. I'm in SE Minnesota, on 10 acres with plenty of the following trees (which I CAN identify): White Oak, Northern Red Oak, Burr Oak, Sugar Maple, Bitternut Hickory, Butternut, Eastern Hophornbeam (Ironwood), Hackberry, Black Cherry, and Aspen. based on the following leaf and bark photos, can anyone identify this tree. I've gone through two different tree ID books and can't seem to find anything that matches this leaf.