298 



GRAFTING BY APPROACH OR INARCHING. 



4 



beech trees, and in beech and hornbeam hedges ; and it is even occasionally 

 imitated by art in young hedges of these, and of several other kinds of trees 

 or shrubs, in order to make a very strong hedge. The principal use, how- 

 ever, 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 attempting an increase by means 

 of detached scions or cuttings. Inarching may be per- 

 formed with various organs of plants ; but in horticulture 

 it is chiefly confined to stems, branches, and roots ; and all 

 the diff^erent forms may be included under side-inarching, 

 terminal inarching, and inarching by partially nourished 

 scions. The season for performing the operation is princi- 

 pally 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 

 grafting knife, and the graft may often be secured from the 

 sun and air by bandages, without the aid of moss, clay, or 

 grafting wax. 



Fig. 224. A scion and 671. Side inarching may be effected either with or with- 

 siock prepared for out tongueing. In the latter case, the incisions in the 

 marching. sclon and the stock are of the simplest description 



(as shown in fig. 224, and in fig. 225, o), 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. 226, in which a is 

 the stock pre- 

 pared with an 

 under tongue, 

 and b, the scion, 

 with an upper 

 tongue for insert- 

 ing into a ; c is 

 the scion and the 

 stock united. 

 One of the pur- 

 poses, though 

 perhaps more cu- 

 rious than use- 

 ful, to which De 

 and 



Thouin say that 



this kind of grafting may be applied, is to increase the number of roots to a 

 tree. Thus, if a tree be planted in the centre of a circle, and three or 

 more of the same, or of allied species, be planted in the circumference, 

 so that their tops may be at a suitable distance for inarching to the 

 centre tree ; then, after the union has been effected, if the parts of the 

 side trees be cut off above the graft, all the sap sent up by their roots will 

 go to the nourishment of the tree in the centre. When the root of one tree 

 is to be inarched into that of another, with a view of strengthening the tree to 

 which the latter belongs, this mode of inarching is the one generally adopted. 



C72. Terminal inarching consists in heading down the stock, and joining 

 the scion to it, either in the manner of splice-grafting, cleft-grafting, or by 



Fig. 225. The scion inarched to 



the stock and bandaged with CandoUe 

 matting. 



Fig. 226. Inarching with the scion 

 and stock tongued and united, 

 but not bandaged. 



