288 



TREES OF NORTH AMERICA 



slightly pendulous branches forming a round-topped head, and slender branches covered 

 when they first appear with fascicled hairs, soon becoming glabrous and gray or grayish 

 brown; the large stems often surrounded by a ring of smaller stems produced from its 

 roots; more often a shrub than a tree spreading into broad thickets. Winter-buds ovoid 



Fig. 264 



to ellipsoidal, acute, \'-\' long, with closely imbricated chestnut-brown puberulous scales 

 ciliate on the margins. Bark thick, rough, deeply ridged. 



Distribution. Dry limestone hills and bluffs; central and western Texas, from the 

 neighborhood of Dallas, Dallas County, and Palo Pinto County to Kendall, Kerr, Brown, 

 Bandera, Real and Menard Counties. 



40. Quercus Durandii Buckl. 

 Quercus breviloba Sarg. in part. 



Leaves thin, obovate to elliptic, entire, 3-lobed toward the rounded or acute apex or 

 irregularly laterally lobed, the three forms appearing on different branches of the same 

 tree, on lower branches usually lobed, dark green and lustrous above, often green and 

 glabrous below, sometimes 6' or 7' long and 3' or 3?' wide, on upper branches mostly 

 entire, white and pubescent or tomentose below, 2|'-3' long, |'~H' wide; falling late in the 

 autumn; petioles glabrous, %'-\ r in length. Flowers: staminate in slender villose aments 

 3'-4' in length; calyx deeply divided into acute villose lobes shorter than the stamens; 

 pistillate on a short tomentose peduncle, the linear acuminate bract and involucral scales 

 hoary-tomentose; stigmas red. Fruit solitary or in pairs, short-stalked or nearly sessile; 

 nut ovoid, or slightly obovoid, rounded or rarely acute at apex, nearly truncate at base, 

 pale chestnut-brown, lustrous, '-f ' long, %-%' thick, barely inclosed at base in the thin, 

 shallow saucer-shaped cup, pale tomentose on the inner surface, and covered with small 

 acuminate closely appressed tomentose scales slightly thickened on the back. 



A tree, often 60-90 high with a tall trunk 2-3 in diameter, comparatively small 

 branches, the lower horizontal, the upper ascending, forming a dense round-topped hand- 

 some head, and slender pale gray-brown branchlets covered when they first appear with 

 fascicled hairs, soon glabrous, or puberulous during their first season, and darker in their 

 second season. Winter-buds ovoid, acute, \'-\' long with dark chestnut-brown rounded 

 scales ciliate on the margins. Bark thin, light gray or nearly white and broken into thin 

 loosely appressed scales. 



Distribution. East of the Mississippi River scattered on rich limestone prairies; west- 

 ward on the well drained soil of river bottoms, and often on low hummocks; near Augusta, 



