THE FOOD OF PLANTS 



91 



latter are used by the flowers as agents of pollination. An 

 account of this relationship is deferred until seed-plants are 



r- 





FIG. 80. An ant plant (Hydnophytum) from South Java, in which an excrescent 

 growth provides a habitation for ants. After SCHIMPER. 



considered, or it may be found, with illustrations, in Plant 

 Relations, Chapter VII. 



