Blackjack Oak
Leaf Characteristics
  • broad, flat leaves
  • simple leaves
  • lobed leaves; some may seem unlobed
  • pinnately lobed
  • with bristle tips, some without
  • not deeply lobed
  • shallow-lobed
Blackjack Oak
Fruit Characteristics
  • acorn
  • cup without fringe, without long stalk
  • acorn no longer than 1"
  • scales not swollen, mostly flat
  • deeper cup
  • cup covers 1/2 of nut
  • nut usually light brown
Blackjack Oak
Quercus marilandica

The Blackjack Oak is small compared to other oaks. Its thick, black bark is deeply divided into rough, nearly square plates. It grows on dry, sandy to clay, upland soils and can be found with other oaks and with pines. As with the Southern Red Oak, the Blackjack Oak is a tree of the Old South. It occurs throughout the southeastern states from southeastern New York into Oklahoma and Texas. The specimen from which this species originally was described was found in the colony of Maryland, hence the specific Latin name, marilandica. In Ohio the Blackjack Oak is limited to a few south-central counties. Although the wood of this tree is hard and strong, it is of little commercial value. Sometimes it is used for rough construction, railroad ties, and for fuel.

Tree Size height 20' - 30' diameter 1' or less Bark