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Wiktionary
blackjack oak

n. (taxlink Quercus marilandica species noshow=1).

WordNet
blackjack oak

n. a common scrubby deciduous tree of central and southeastern United States having dark bark and broad 3-lobed (club-shaped) leaves; tends to form dense thickets [syn: blackjack, jack oak, Quercus marilandica]

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.