ON THE PROTECTION OF BUDS 



79 



consider the various plans which have been adopted 

 with this object. By that time, indeed, the tissues 

 have become hardened, and more capable of resistance 

 to external influences. 



It would seem, however, that it would have been an 

 advantage if the petiole of the Plane, instead of detaching 

 itself at the base, had separated higher up, thus leaving 

 a cap to protect the young 

 bud. 



This, in fact, does happen 

 in other cases. Thus, in 

 Philadelphus (the Sweet 

 Syringa of our gardens and 

 shrubberies), in Actinidia 

 oolomicta (fig. 120) (accord- 

 ing to Hildebrand), Robinia, 

 and some other species, if we 

 examine a shoot, we shall at 

 first see no traces of buds. 



Fig. 121 gives a section 

 through such a twig of 

 Philadelphus at one of the 



joints, on the right side before, and on the left after, 

 the fall of the leaf. 



Fig. 122 gives a section of one side of a similar 

 knob, more magnified ; a a shows the line along which 

 the leaf L will detach itself, leaving a pedestal, which 

 completely protects the bud, by the growth of which it 



Fig. 120. Actinidia colomicta. 

 Section shortly before the leaf falls ; bud 



completely covered. S, stem ; L, leaf ; 



a a, plane of separation of leaf. 



