THE NUTRITION OF PLANTS 
163 
latter are used by the flowers as agents of pollination. An 
account of this relationship, with illustrations, was given in 
Fio. 153. An ant plant ( ffydnopkytum) from South Java, in which an excrescent 
growth provides a habitation for ants. After SCHIMPEB. 
Chapter VII, but it should be associated with other illustra- 
tions of symbiosis. 
