The acorns are similar to White Oak, but smaller. The wood is used for rough construction, for railroad ties, and as the name indicates, posts.
Post Oak is smaller than White Oak but in open areas they both develop the same rounded form. Post Oak's bark is grayish, with broad, scaly ridges. The oblong leaves, clustered at ends of twigs, are thicker, hairy beneath, and more leathery than in White Oak. They hav three to seven broad lobes, the middle ones being the largest. The leaf is wedge-shaped at its base. Occasionally trees with three-lobed leaves are found.
