Black birch
Published by espringer,
Young bark on the black birch (betula lenta) looks like the patch at right (almost smooth with horizontal lenticel marks), and mature bark has many rough areas as at left, but mid-sized trees often show a patchy combination of both. (In a photo, it’s hard to capture the very subtle iridescence of this tree.)
I haven’t seen a black birch without patches of the distinctive horizontal-lenticel bark, but really old black birches (according to Wojtech) lose all their earlier plates of original smooth bark, and the rough bark underneath eventually fragments too, leaving a trunk that looks hardly like a birch at all…