3i6 



Introduction to Botany. 



attention to parasitic habits of life ; and now an instance of 

 another character will be given to illustrate the sharp 

 competition which is so common among plants. 



Fig. 165. 



Photograph of Sicyos angulatus clambering over undershiubs in the foreground and 

 over willow trees in the background. The plant is bedecked with its clusters of 

 white fiowers. 



The one-seeded bur cucumber, Sicyos angulatus, has had 

 certain of its branches modified in the form of tendrils 

 which are so sensitive to contact that when they touch the 

 branches of other plants they twine about them, drawing 



