Sugar maples have dark gray bark with furrowed ridges, not as easily identifiable compared to other Michigan tree species. More on Sugar maples here from the Michigan DNRBeechIn southern Michigan, American beech trees grow in beech-maple forests. It is an ashy gray color and, compared to some Michigan species, is easier to identify due to its blocky bark. When comparing the white oak leaf to the red oak, it is easy to tell the difference because the red oak has pointed leaf tips. Jack pine needles are much shorter than red pine needles at a length of to 2 long.