218 



VEGETABLE PHYSIOLOGY 



its nutriment entirely from its host, which is frequently a 

 herbaceous plant. The different species of the genus infest 



FIG. 106.-SECTION OF STEM OF DICOTYLEDONOUS PLANT ATTACKED BY 

 HAUSTOBIA OF Cuscuta. 



different plants, each having only one suitable host. None 

 of the species are like Lathr*ea in being partially carnivorous. 



