CHAPTER X. 



DIFFERENT KINDS OF SHOOTS. 



Coexistence of long and dwarf-shoots Spurs of the Pines Varia- 

 tions in development Beech Effects on the branching Trees 

 with marked development of dwarf-shoots Transitions 

 Spurs, flowers and thorns. 



Our study of the bud at rest, and of the developing 

 shoot, has shown that the latter elongates by the growth 

 of its successive segments, or internodes, at different 

 rates in different parts of the shoot ; we have also seen 

 that some buds give rise to leafy shoots only, others 

 to flowering shoots and so on. But even in the leafy 

 shoots of one and the same parent axis, we find consider- 

 able differences in the growth of the young shoots as 

 they emerge from the bud. 



In some cases the shoots extend most of their inter- 

 nodes rapidly, and develop into " Long shoots " such as 

 the leaders we have referred to above ; but in other cases 

 the shoot, although it may possess quite as many inter- 

 nodes as the long shoot, only elongates just sufficiently 

 to enable the leaves to expand, and these "Dwarf-shoots" 

 or "Spurs" appear to have hardly any differences between 

 node and internode at all, the leaf-insertions being so 

 closely crowded that the leaves are in rosettes. 



Striking examples of the coexistence of these dwarf- 



