The Quercus Marilandica
is commonly known as Barren Oak
, Black Jack Oak
, Black Oak
, Blackjack Oak
, Jack Oak
, as well as Scrub Oak< Go Back
Blackjack oak occurs in the central and eastern United States from Long
Island, New York, New Jersey, and southeastern Pennsylvania; south to
northwestern Florida; west to central Texas, western Oklahoma and
eastern Kansas; and north to southern Iowa, central Illinois, southern
Indiana, and southern Ohio [27
The currently accepted scientific name of blackjack oak is Quercus
marilandica Muenchh. [28
]. Blackjack oak has been placed within the
subgenus Erythrobalanus, or red (black) oak group [49
]. There are no
recognized subspecies, varieties, or forms.
Blackjack oak hybridizes with the following species [28
x Q. falcata (southern red oak)
x Q. geogiana (Georgia oak): Q. X smallii Trel.
x Q. ilicifolia (bear oak): Q. X brittonii W. T. Davis
x Q. imbricaria (shingle oak): Q. X tridentata (A. DC.) Engelm.
x Q. incana (bluejack oak): Q. X cravenensis Little
x Q. nigra (water oak): Q. X sterilis Trel.
x Q. phellos (willow oak): Q. X rudkinii Britton
x Q. rubra (northern red oak)
x Q. shumardii (Shumard oak): Q. X hastingsii Sarg.
x Q. velutina (black oak): Q. X bushii Sarg.
x Q. laurifolia (laurel oak): Q. X diversiloba Tharp ex A. Camus
Blackjack oak occurs as a dominant tree in savannas and in forests
adjacent to grasslands. It forms mixed stands with post oak (Quercus
stellata) in the prairie transition area of central Oklahoma and Texas,
where the eastern deciduous forests grade into the drier western
Blackjack oak shares dominance with bluejack oak and sand post oak (Q.
stellata var. margaretta) on the slightly more mesic midslopes of
sandhills, downslope from the xeric ridges that support turkey oak (Q.
The Pine Plains of New Jersey are characterized by a community of
dwarfed blackjack oak, bear oak, and pitch pine (Pinus rigida) .
The following published classifications list blackjack oak as a dominant
or codominant species:
Eastern deciduous forest 
The natural communities of South Carolina 
Forest vegetation of the lower Alabama Piedmont 
Forest vegetation of the Big thicket, southeast Texas 
The natural forests of Maryland: an explanation of the vegetation map
of Maryland 
< Go Back
Much of the information presented here is attributed to:
Carey, Jennifer H. 1992. Quercus marilandica. In: Fire Effects Information System, [Online].
U.S. Department of Agriculture, Forest Service,
Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available at USDA Forest Service.