Michigan Trees: A Handbook of the Native and Most Important Introduced Species
d. Bark of trunk ash-gray or nearly white, flaky; acorns
maturing in autumn of first season; kernel of nut sweet.
e. Buds conical, acute; bud-scales scarious on the margins; nut white-downy at the apex. [1] _Q. muhlenbergii_, p. 107.
ee. Buds broadly ovoid, obtuse; bud-scales not scarious on the margins; nut not white-downy at the apex. [1] _Q. alba_, p. 101.