STEMS 



61 



branches, as observed in the passion-flower, whose long 

 and very sensitive tendrils appear in the axils of the leaves 

 (Fig. 59). Whether tendrils replace leaves or branches 



FIG. 59. Plants of passion-flower showing axillary tendrils. 



makes no difference as to their structure and activity, but 

 it is of interest to note that different organs may thus be 

 replaced by the same organ. 



