Wiktionary
blackjack oak
n. (taxlink Quercus marilandica species noshow=1).
WordNet
Usage examples of "blackjack oak".
Ahead of him, Longarm caught the glint of a campfire's light flickering among the trunks of the big sweet gum and blackjack oak trees that grew thickly on both sides of the river trail.
Still, he kept the car at a walking pace, just in case, bringing it up to what was left of the east side of the barn, pulling it into his old parking place in the shade of a blackjack oak.