VI] DEVELOPMENT OF FORM 79 



Let us now examine another case. In Fig. 26 I have 

 diagrammatically represented the young pyramidal sapling 

 condition of a tree with opposite and decussate buds and 

 branches. It is obvious that if every bud developed a 

 shoot regularly, a very symmetrical tree would result, 

 reminding us of the example already examined in con- 

 nection with Figs. 17 21. 



It will also be obvious that, assuming that the above 

 does not occur, considerable differences would result in 

 the further branching according to whether the outwardly 



Fig. 26. 



directed or the inwardly directed buds developed the more 

 vigorously into long shoots and branches. In Fig. 27, 

 I have represented the somewhat more vigorous growth 

 of the outwardly directed buds, the result being a pyra- 

 midal tree of a type commonly met with among the 

 Maples, Sycamore and others. In other respects the sym- 

 metrical development of the stem and branches has not 

 been interfered with: the tree diagramrnatically shown in 

 Fig. 26 was photographed as it stood, and then altered 



