262 



GRAFTING BY APPROACH OR INARCHING. 



Fig. 223. 



I 



very strong hedge. The principal use, however, of grafting by 

 approach is to propagate plants of rarity and value, which it is 

 found difficult to increase by any other means, and of which it is 

 not desirable to risk the loss of any part by at- 

 tempting an increase by means of detached scions or 

 cuttings. It is also much employed in France for 

 furnishing bare portions of fruit trees. Inarching 

 may be performed with various organs of plants ; but 

 in horticulture it is chiefly confined to stems, branches, 

 and roots ; and all the different forms may be included 

 under side-inarching, terminal inarching, and in- 

 arching by partially-nourished scions. The season 

 for performing the operation is principally in spring, 

 when the sap is rising ; but it may be effected at 

 every season, except during severe frost or extreme 

 heat. No other instrument is necessary than the 

 A scion and stock grafting-knife, and the graft may often be secured 

 prepared for in- f rom the sun and air by bandages, without the aid of 

 arching. -, /> 



moss, clay, or grafting wax. 



Side-inarching may be effected either with or without tongueing. 

 In the latter case, the incisions in the scion and the stock are 

 of the simplest description (as shown in fig. 223 and in fig. 224 a), 

 and the parts being bound together with matting, as at b, and covered 

 by clay or moss, are left to form a union. Side-inarching with 

 a tongue is represented in fig. 225, in which a is the stock prepared 



Fig. 224. 



Fig. 225. 



The scion inarched to the stock 

 and bandaged with mat- 

 ting. 



Inarching with the scion and stock 

 tongued and united) but not ban- 

 daged. 



with an under tongue, and b the scion, with an upper tongue for in- 

 serting into a ; c is the scion and the stock united. One of the pur- 

 poses, though perhaps more curious than useful, to which De Candolle 

 and Thouin say that this kind of grafting may be applied, is to in- 

 crease the number of roots to a tree. Thus, if a tree be planted in 



