98 TREE-PLANTING. 



All the species of American hickory bear a close 

 affinity to the walnut, and are included in the same 

 Natural order. 



The Black Walnut of America (J. nigrd]. In its 

 native country this tree is found attaining a great 

 altitude, a hundred feet being no uncommon height, 

 with a trunk of proportionate size. It was introduced 

 into England about the middle of the seventeenth 

 century, the tree, being of robust growth, exceeding 

 that of the common species. Its leaves are about 

 twice as long as those of the Royal walnut, and are 

 composed of six or eight pairs of opposite leaflets, 

 with a single or terminal leaflet ; which emit, as in 

 the case of the common kind, a strong aromatic 

 odour. 



It is readily raised from seed, which is mostly 

 imported for the purpose, and its method of culti- 

 vation is the same as that pursued in the instance of 

 the ordinary species. The fruit however is of inferior 

 quality to the common species, and is so much later 

 in ripening that it is only adapted for being grown 

 as a timber tree in this country, being particularly 

 well suited for a lawn, or the adornment of park-like 

 grounds, where it can stand singly, where it assumes 

 a very commanding appearance, and becomes a large 

 spreading tree of great beauty. 



The Gray Walnut Tree (J. cinered). This tree is 

 also a native of America, and bears a strong likeness 

 to the preceding, but is less often met with, being 

 propagated in the same manner as the other species. 



