VEGETATIVE PROPAGATION 



249 



This method is used for rapid production of established plants in the 

 case of currants, vines, and various fruiting stocks. But some plants 



Fig. 172. 

 Propagation by layering. 



(After Figuier.) 



are refractory and difficult to root. In such cases the stem below the 

 shoot it is desired to establish may be nicked with a knife, and packed 

 with wet moss or soil. Roots may then be formed, after which the 

 shoot may be severed. 



Budding and grafting are 

 methods commonly used for 

 woody plants, but latterly they 

 have been employed also with 

 success in succulent plants. 

 These processes consist in the 

 insertion of a single bud, or of a 

 shoot bearing a number of buds, 

 not in the soil, but upon the 

 corresponding tissues of some 

 related plant. In the case of 

 shield budding, which is largely 

 practised in the propagation 

 of varieties of roses, a bud is 

 removed from the plant which 

 it is desired to propagate, together with an area of superficial tissues 

 separated at the cambium layer. A surface for its reception is 



1 



Fig. 173. 



Method of shield-budding or cushion-grafting. 

 (After Figuier.) 



