164 VEGETABLE PHYSIOLOGY 



make it probable that, like the red seaweeds, these organisms 

 contain a certain amount of chlorophyll, together with 

 the purple pigment. 



Saprophytic and parasitic fungi, which contain no 

 chlorophyll, have no power of photosynthesis. They are 

 compelled to absorb their carbohydrates from the medium 

 in which they grow, and they take them in chiefly in the 

 form of sugar. Parasitic phanerogams depend upon a 

 similar source of supply. 



