

If 



^ 



LONGITUDINAL SECTION OF A LEAF BUD 



The bud is a very important organ of the plant, and from the young and tender nature of its 

 parts is very susceptible to injury. This is especially true of the "resting buds" of northern 

 climates, which have to survive the winter and are frequently wet and frozen. In tropical 

 climates with plenty of moisture the chlorophyll of the minute leaves might be decom- 

 posed by the intense radiation. Buds are carefully protected from these dangers in many 

 different ways, b}- the older leaves, by scales, hairs, wax, etc. The commonest way is 

 by a modification of leaf-steams to form a relatively hard, smooth, seal}- coat. Photo- 

 micrograph by John Howard Paine. (Fig. 13.) 



