Fig. 3. 



The four megaspores, the lower one being functional, the 

 others in course of disintegration, x 280. 



Fig. 4. 



V 





The apex of an ovule, showing the micropyle with its dome- 

 shaped projection, and the nucellus with pollen grains and 

 their tubes. The lower portion shows the endosperm 

 with the layer of cells from which are organized the arche- 

 gonia. Between the endosperm and the nucellus are the 

 breaking down cells of the tapetum layers, x 96, 



