70 



PLANT GROWTH 



a union is made (Plate IV). The greatest care must be 

 taken to have a long union of the cambium and other like 

 tissues. Seedling roots which are often used permit two or 

 three stocks to be made from each. The scion should have 

 two or three buds. 



Cleft grafting is usually done on older branches where 

 the scion is inserted in the one side of the split end of a stock 

 cut at right angles. Here again the cambium of one side of 

 the scion must be in line with the stock cambium (Fig. 14). 



ABC D E 



Fig. 14. Methods of grafting. A, B, between stock and scion of similar size. 

 C, D, E, between a large stock and small scions. F, G, H, bud-grafting. (From Smith 

 et al., Textbook of General Botany. By permission of The Macmillan Co., publishers, 

 1935.) 



One, two, or more scions may be put in the same stock. The 

 best-shaped plant will result later if only one is allowed to 

 grow on a stock a little larger than the scion. 



Budding might be considered a form of grafting since a 

 single bud with some bark and a little wood (in some cases 

 the wood is removed) is placed in a slit of the bark of the 

 stock plant so that the cambium will unite and grow phloem 

 and xylem in the union (Fig. 14) . This method is used com- 

 monly with peaches and roses. It is very important to keep 

 the buds in a natural fresh condition until used. Budding is 

 generally done low on the plant, that is about the ground 

 level or just below, in early summer while the bark can be 



