PROPAGATION BY BUDDING AND GRAFTING 167 



parts are both attached to their own roots. When the parts 

 have grown together, one of them is severed from its root. 



The practice of inarching is explained in Fig. 196. In this 

 case, the larger plant (on the left) is designed for the stock. 

 When the smaller plant has united, it is cut off just below the 

 union and it thenceforth grows on the other plant. Limbs 

 of contiguous trees are sometimse grafted in this way. It 

 is the process employed by nature in what is called nat- 

 ural grafting (Fig. 129). Grape-vines are often inarched. 



A thrifty young branch of a 

 fruit-tree may be inarched into 

 the stem of a fruit on the same 

 tree, thus supplying the fruit 

 with additional food and caus- 

 ing it to grow larger than it 

 might if untreated. 



To join the parts, it is neces- 

 sary only to remove the barks 

 between the stock and cion 

 and then tie the two together 

 snugly. The details are shown 

 in Fig. 197. In M, a branch c is 

 joined at o to the stock H. 

 Other branches, like T, might be 

 similarly treated. In N, the method of cutting the conjoined 

 surfaces is explained at R. If outdoors, the junction should be 

 waxed over ; and it is then necessary, also, to secure the branches 

 so that the wind cannot loosen them. The parts are some- 

 times joined by a tongue, after the manner of a whip-graft, 

 but this is rarely necessary. Oranges and camellias were often 

 propagated by inarching in the old practice, but this work is 

 now much more easily accomplished by the veneer-graft. 



Double-working. Grafting on a grafted tree is known as 

 double-grafting or double-working. It is employed for the 



FIG. 197. Details of inarching. 



