THE GYMNOSPERMS 



397 



Fig. 375- 

 A cycad (Cycas revoluta), showing cluster of fertile leaves (macrosporophylls) in the center. 



Fig. 376- 



A sporophyll (stamen) of cycas; sporangia in 

 groups on the underside, b, group of sporangia; 

 c, open sporangia. (From Warming.) 



Fig- 377- 



Macrosporophyl! of Cycas 

 revoluta. 



