254 



ELEMENTS OF BIOLOGY 



never reproduces another spore-bearing generation but always a 

 gamete-bearing green plant. The gamete-bearing plant is known as 



FERTILIZATION 



ARCHEGONIUM ANTHERIDIUM 



GAMETOPHYTE 

 GENERATION 



GAMETOPHYTE 



GERMINATING 

 SPORE 



\ 



EMBRYO 

 YOUNG SPOROPHYTE 

 GAMETOPHYTE 



SPOROPHYTE 

 GENERATION 



LEAFY SPOROPHYTE 



SPORANGIUM 



SPORE 

 Fig. 174. — Diagram of the life cycle of a common fern. 



the GAMETOPHYTE, while the brown, parasitic, spore-bearing genera- 

 tion is termed the sporophyte. 



