ORIGIN OF THE SPOROPHYTE 



But more specialized and older parts of the plant sh 

 characteristics. Some of these regions hecome speci; 

 various vegetative activities, assimilation, conduction 

 storage, etc.; some become protective, as the epide 

 cortical regions, and some strengthening. There comes 



that of spore formation or serogenesis' 



Sporogenesis in the simpler sporophytes generally 

 extensive regions of the plant, sometimes almost tl 

 structure as in certain liverworts (Ricciales). How 

 evolutionary tendency among higher forms is to deve 

 extensively the purely vegetative tissues thereby redn 

 portionately the spore bearing areas. This very import 

 ciple involves the sterilization of sporogenous tissue an< 



in complexity until the sporogenous tissue becomes on 

 special organs, termed sporangia. But we cannot 



