4Q 



Garden and Forest. 



[JANUARY 22, 189O. 



The leaves of the Nettle-tree vary more than its habit of 

 growth under the influence of its climatic environment, 

 although certain characters, especially the arrangement 

 of the veins and the nature of the pubescence which 

 clothes them always in their young state, are common 

 to them all. The trees produced on the fertile soil of the 



rather coriaceous leaves with entire margins, very common 

 in the southern States, has been described as C. integrifolia 

 (Fig. 9). This form passes, however, into forms with 

 leaves more or less serrate. The leaves of the dwarf form 

 (the C. pumila of botanists, Fig. 10) are generally not more 

 than two inches long when fully grown and are often much 



Celtis occidentalis : Massachusetts. — See page 39. 1. Fruiting branch. 2. Flowering branch. 



Mississippi Valley have large, membranaceous leaves with 

 deep sharp serratures (Fig. 7, p. 39) quite smooth on the upper 

 surface and only slightly rugose on the lower. This is the 

 form which has been called both Celtis Mississippiensis and 

 C. crassifolia. On the New England trees the leaves are 

 smaller, and generally narrower, thinner, less coarsely 

 serrate, glabrous or only slightly rugose on the upper sur- 

 face (Fig. 8). The form with narrowly acuminate, smooth, 



smaller; they are generally entire, although sometimes 

 deeply and sharply serrate. The leaves of the Rio Grande 

 form (C. Berlandieri, Fig. 11) are acute, with a long, slender 

 point often somewhat falcate and quite glabrous on the two 

 surfaces. The most distinct of all the varieties is that of 

 the arid south-west, the C. reticulata of Torrey (Fig. 1 2). The 

 leaves of this variety are thick, coriaceous, entire, con- 

 spicuously venulose, rough on the upper surface, and 



