THE PROPAGATION OF PLANTS 139 



spring they are set into the ground up to the 

 top bud. 



235. Single -eye cuttings that is, one -bud 

 cuttings are sometimes employed when buds 

 are scarce, as in new or rare plants. These are 

 usually started under glass. They are planted 

 half an inch or an inch deep, in an oblique or 

 horizontal position. 



236. Grafting is the operation of making 

 one plant, or a part of it, grow upon another 

 plant. The part which is transferred or trans- 

 planted is the cion ; the plant into which this 

 part is transplanted is the stock. 



237. A cion may contain one bud or many. 

 It may be inserted in a cleft or split in the 

 wood of the stock, or it may be inserted 

 between the bark and wood of the stock. A 

 single bud which is inserted between the bark 

 and wood is technically known as a " bud," and 

 the process of inserting it is known as budding; 

 but budding is only a special kind of grafting. 



238. The cion and stock unite because the 

 cambium of the two grow together. This cam- 

 bium is between the bark and the wood (207) : 

 therefore it is important that the inner face of 

 the bark of the cion (or bud) be applied to the 

 surface of the wood of the stock ; or, if the 

 cion is inserted in a cleft, that the line between 

 the bark, in the two, come together. 



