TISSUES AND PROCESSES OF STEMS 



293 



[Chap. XXVIII 



stem or root of another plant ( the stock ) . If the cambiums of the stock 

 and the scion are in perfect contact and if proper precautions are taken, 

 union of the meristematic tissues takes place rapidly. There are many 

 types of grafting (Fig. 112), and reference to any manual on horticul- 



FiG. 112. Methods of grafting and budding. At the left, whip grafting; in the 

 middle, cleft grafting; at the right, budding. A, represents the scion, and B, the 

 stock. C, the scion and stock are joined. In both grafting and budding, success 

 depends on bringing the cambium of the scion into contact with the cambium of 

 the stock. Courtesy of World Book Co. 



tural practices will indicate the preferred methods for different kinds 

 of plants. Budding or bud grafting differs from twig grafting only in the 

 fact that a bud and some additional tissues are inserted in a T-shaped slit 

 in a branch. If the cambiums of the bud tissue and the branch are in 

 contact, the two pieces soon unite. 



It is evident that neither twig grafting nor budding is possible in 

 stems without cambiums, as for example in corn, wheat, rye, and many 

 other grasses. A further discussion of grafting is gi\'en in Chapter XXXV. 



REFERENCES 



Bailey, L. H. Standard Cyclopedia of Horticulture. The Macmillan Company. 



1915. 

 Fames, A. J., and L. H. McDaniels. An Introduction to Plant Anatomy. 



McGraw-Hill Book Company, Inc. 1925. 

 Hayward, H. E. The Structure of Economic Plants. The xMacmillan Company. 



1938. 



LIBRARY 



'^ 



^^^ 



y^. 



<>*■ 



