112 MONOCOTYLEDENOUS ANGIOSPERMS 



style contains a great number of loosely arranged inner cells 

 which secrete food to nourish the developing pollen tube. 



FIG. 66. Wild yellow lily (Lilium canadense). The upper figure is a 

 cross-section of the anther showing chiefly the first division of the spore- 

 mother cells. The lower figure is a cross-section of the ovary, showing the 

 three cavities and six rows of ovules. 



The ovary or enlarged part of the pistil has three cavities 

 separated by septa or walls. Part of the wall is modified, 

 becoming the placenta which forms a ridge and from which 

 the ovules develop. 



