Quercus marilandica
| Blackjack oak | |
|---|---|
| Dormant blackjack in the Cross Timbers of Lincoln County, Oklahoma | |
| Scientific classification | |
| Kingdom: | Plantae | 
| Clade: | Tracheophytes | 
| Clade: | Angiosperms | 
| Clade: | Eudicots | 
| Clade: | Rosids | 
| Order: | Fagales | 
| Family: | Fagaceae | 
| Genus: | Quercus | 
| Subgenus: | Quercus subg. Quercus | 
| Section: | Quercus sect. Lobatae | 
| Species: | Q. marilandica | 
| Binomial name | |
| Quercus marilandica | |
| Generalized natural range of Quercus marilandica | |
| Synonyms | |
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Quercus marilandica, the blackjack oak, is a small oak, one of the red oak group Quercus sect. Lobatae. It is native to the eastern and central United States.