326 TREES OF NORTH AMERICA 



western Oklahoma, and southern New Mexico; in southwestern Missouri; in Tamaulipas 

 and Coahuila, Mexico. The common Celtis of the Texas Panhandle. 



A shrubby form from Nolan County, Texas, with red-brown branchlets densely pubes- 

 cent in their first season, becoming puberulous during their second year, and smaller 

 leaves with more prominent reticulate veinlets, on densely pubescent petioles, is distin- 

 guished as forma microphylla Sarg. 



6. Celtis pumila Pursh. 

 This shrub of the eastern states is sometimes a small tree in its southern variety, 



Celtis pumila var. georgiana Sarg. 



Leaves ovate, acute or acuminate, obliquely rounded at base, entire or sharply serrate, 

 especially on vigorous leading shoots, thin, dark green and rough on the upper surface, 

 pale and more or less pubescent or nearly glabrous along the midrib and veins below. 

 H'-2|' long and f'-H' wide; petioles slender, pubescent, |'-j' in length. Flowers on 

 pubescent pedicels; calyx divided into usually five lanceolate acuminate lobes; the disk 





Fig. 298 



pubescent. Fruit on pubescent pedicels as long or slightly longer than the petioles, sub- 

 globose, reddish purple, often covered with a glaucous bloom, \' in diameter; nutlet covered 

 with conspicuous reticulate ridges. 



A shrub or small tree occasionally 30 high, with slender dark red-brown pubescent 

 branchlets, light red-brown and sometimes bright red-brown before the end of their first 

 year. 



Distribution. Piedmont region of North and South Carolina, central Georgia to western 

 Florida; and Dallas County, Alabama; in southern Missouri, and southern Illinois. 



4. TREMA Lour. 



Unarmed trees and shrubs with watery juices and terete branchlets. Leaves alternate, 

 often two-ranked, serrate, penniveined, three-nerved from the base, short-petiolate, per- 

 sistent; stipules lateral, free, usually small, caducous. Flowers apetalous, small, monoe- 

 cious, dioecious or rarely perfect, in axillary cymes; calyx five or rarely four-parted, the 

 lobes induplicate, valvate or slightly imbricated in the bud, or in perfect flowers more or 

 less concave and induplicate; stamens five or rarely four, opposite the calyx-lobes and in- 

 serted on their base, occasionally present in the pistillate flower; filaments short, erect: 

 anthers oblong, attached on the back near the base, introrse, two-celled, the cells opening 



