470 SPERMATOPHYTES (SEED PLANTS) 



Notable Features of Angiosperms. In contrast to Gymno- 

 sperms, the Angiosperms have the flower; a megasporophyll con- 

 sisting of an ovary, in which the megasporangia are enclosed, and 

 of a stigma to receive the pollen; more reduced gametophytes; 

 and endosperm nucleus and double fertilization. The life cycle 

 of an Angiosperm is shown in Figure 414- 



