82 Bulletin of the University of Texas 



New Jersey to 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 contorted and form a compact rounded crown. 

 Bark !'-!%' 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 

 belowv; 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 %' long, hairy, light yellow brown sometimes striate ; 

 enclosed for about two-thirds its length in the top-shaped cup ; 

 scales of cup blunt, light or reddish brown, hairy, rather loose 

 particularly near the top. 



New York to Pennsylvania, Indiana and Nebraska, south 

 to Florida and Texas. 



The wood is of little value except for fuel. 



