ULMACE^E 323 



A tree, occasionally 30 high, with a trunk rarely more than 12'-18' in diameter, stout 

 spreading branches forming a broad open irregular head, and slender pubescent branch- 

 lets roughened by numerous small lenticels, becoming darker and glabrous in their second 

 season. Bark of the trunk and large branches dark and covered with high thick wart-like 

 excrescences and ridges. Wood not strong nor durable, of little value even for fuel. 



Distribution. Rich bottom-lands and on low adjacent hills of streams flowing south- 

 ward from the Edward's Plateau (Goliad, San Antonio, New Braunfels, San Marcos) and 

 near Austin, Travis County, Texas. 



4. Celtis reticulata Torr. Hackberry. 



Leaves broadly ovate, acute or acuminate, obliquely rounded at base, entire, thick, 

 dark green and rough or rarely smooth on the upper surface, yellow r -green and conspicu- 

 ously reticulate-venulose and sparingly pilose along the prominent midrib and veins on 



Fig. 294 



the lower surface, lJ'-3' long, f'-l*' wide; petioles stout, \'-\' in length, more or less 

 densely pubescent. Flowers not seen. Fruit on pubescent pedicels \'-\ r in length, ripen- 

 ing in September, subglobose to ellipsoid, orange-red or yellow, lustrous, \ r in diameter. 



A tree, rarely 30 high with stout ascending branches forming an open irregular head, 

 and slender red-brown branchlets tomentose or pubescent early in their first season and 

 pubescent or glabrous in their second year; or often a shrub. Bark thick and rough. 



Distribution. Dry limestone hillsides, rocky ridges and canon slopes, western Texas, 

 from the valley of the upper Rio Frio, Uvalde County, to Oklahoma (Ozark region, near 

 Page, Le Flore County to the southwestern borders of the state) ; in mountain ravines 

 through southern New Mexico, and in southern central and northeastern Arizona. 



A variety with more pubescent serrate leaves, those on vigorous shoots mostly cordate 

 at base and covered above with short white hairs, is distinguished as var. vestita Sarg. 

 A small tree with slender pubescent branchlets and a trunk 12'-15' in diameter. In low 

 ground, along the North Fork of the Canadian River, near Canton, Blaine County, Okla- 

 homa. 



5. Celtis laevigata K. Koch. Sugarberry. Hackberry. 



Celtis mississippiensis Spach. 



Leaves oblong-lanceolate, long-pointed and acuminate at apex, unsymmetrically 

 rounded or cuneate or obliquely cuneate at base, often falcate, entire or furnished with a 

 few teeth near the apex or serrate (var. Smallii Sarg.), thin, smooth, glabrous or rarely 

 rough above, light green on both surfaces, 2|'-5' long and f -l' wide, with a narrow yellow 



