100 



ELEMENTS OF STRUCTURAL BOTANY. 



stem-branches. It is found that the branching of stems 

 proceeds upon two well defined plans. 



142. Monopodial Branching. This system is distin- 

 guished by the circumstance that all the branches are the 

 result of the development of strictly lateral buds. In 

 other words, there is invariably a terminal bud at the 

 apex of the stem distinct from the lateral buds produced 

 behind the apex. Of this system there are several 



\ 



Fig. 130. 



Fig. 127. 



modifications. If the terminal bud develops regularly, as 

 well as the lateral ones, it is clear that we shall have a 

 straight and well-defined trunk, easily distinguished by 

 its vigorous growth from the branches. The Pine or 

 the Spruce is an excellent example of this effect. 



Figs. 127, 128, 130. Diagrams of various forms of monopodial branching. 

 (Sachs.) 



