The mountain was named for its blackjack oak timber. Blackjack Creek was named for the blackjack oak trees lining its course. In America, condensed tannins are also present in the bark of blackjack oak ("Quercus marilandica"). Trees in the park include Bur Oak, Water Oak, Blackjack Oak, Pecan, Eastern Red Cedar. Tree types unique to the unit include blackjack oak and swamp tupelo.