84 DEVELOPMENT OF FORM [CH. 



with in well-grown Horse-chestnuts developing in the open, 

 as in a park for instance. 



We will now pass to a different type altogether. 

 Fig. 33 is a fairly representative diagram of a type of 

 sapling abundantly represented by our common fruit- 

 trees, the Rowan, Birch and others, and differs funda- 



Fig. 32. 



mentally from all the preceding in having its laterals 

 alternately and spirally arranged on the parent axis, and 

 coming off at acute angles from it. The simple further 

 development of its laterals in approximately equal pro- 

 portions gives us (Fig. 34) a quite common fruit-tree type 

 and often seen in the Rowan. In Fig. 35 the only alteration 



