82 Bulletin of the University of Texas 
New Jersey tc Missouri, Florida and Texas. In Texas it 
extends to the valley of the Brazos. 
Its uses are similar to Quercus rubra. The tree is planted 
for ornament and shade, for which it is well adapted. 
22. Quercus Marylandica Muenchaussen. Black Jack Oak. 
Black Jack. A forest tree 40°-50° high with trunk diameter 
of 18’, but usually much smaller. The- branches are short, 
stout, often eontorted and form a compact rounded crown. 
Bark 1’-114’ thick, black, very rough on mature trunks. Leaves 
broadly obovate 6’-7’ long, 3-5 lobed, narrowly rounded or 


Fig. 18. Quercus Marylandica. 
heart-shaped at base, thick almost leathery, deep green and 
smooth above, paler pubescent and with prominent venation 
below; the notches between the lobes quite variable, fre- 
quently only undulate lobed; lobes bristle tipped. Acorns 
borne solitary or in pairs sessile or nearly so; nut subglobose 
or ovoid 34’ long, hairy, ight yellow brown sometimes striate ; 
enclosed for about two-thirds its length in the top-shaped cup; 
seales of cup blunt, light or reddish brown, hairy, rather loose 
particularly near the top. 
New York te Pennsylvania, Indiana and Nebraska, south 
to Florida and Texas. 
The wood is of little value execpt for fuel. 
