90 DEVELOPMENT OF FORM [CH. VI 



terminal shoot has ceased to elongate. The further 

 passage to Fig. 41 is equally intelligible. Here the 

 spreading large branches are taking on the proportions 

 of limbs, and, owing partly to the direction of growth- 

 energy into certain branches, at the expense of others, 

 and partly to the abundant casting of shoots which is 

 going on, these larger limbs and branches become very 

 tortuous and widely extended, and an easily recognisable 



Fig. 42. 



type results, of which many Planes, Robinia, Chestnut, 

 Walnut and Oaks would furnish examples. Such a type 

 is shown further developed in Fig. 42. 



The foregoing illustrations will suffice to show what a 

 complex matter in its summation, but what a simple one 

 in its graduated steps, the shaping of a tree is. 



