398 



VEGETABLE PHYSIOLOGY 



evident that growth can have nothing to do with the move- 

 ment. In these instances we have rather to do with a 



FIG. 158. SECTION OF STEM OF DICOTYLEDONOUS PLANT ATTACKED BY 

 HAUSTOKIA OF Cuscuta. 



modification of turgescence, involving a redistribution of 

 the water contained in the organ. The falling of the leaflets 



