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. 
