102 



ELEMENTS OF STRUCTURAL BoTXVV 



commonly this latter form becomes straightened out. 

 Fig. 130, so that the successive branches are in the same- 

 line, and look like a stem developed from the terminal 



bud. As the foot or 

 support is not in this 

 case the continuation 

 of a single axis, but 

 is made up of a num- 

 ber of successive 

 branches superposed, 

 these forms are said 

 to be sympodial, the 

 prefix in this term 

 having the same sig- 

 nificance as in "syn- 

 carpous" and the like, 

 and implying that the 

 foot is composed of 

 several coherent parts. 

 In these cases, then, 

 we have a ,sv/my;o///V/7 

 monopodiuiH. 

 In this system the 

 growing point at the apex of the stem divides into two new 

 growing points, both of which are, therefore, terminal and 

 not lateral, as in the first mode. The growing points of 

 the branches, in their turn, are each converted into two 

 new ones, as shown in Fig. 131. As in the monopodial 

 mode, there may be helicoid and scorpioid dichotomy, 

 due to the superior development of the growing points on 



Figs. 131, 132, and 133. Diagrams to illustrate dichotoinoua branching. 

 (Sachs.) 



Pig. 133. Fig. 132. 



145. Dicliotomous Branching. 



