148 



MOSSES AND FERNS 



CHAP. 



longer, although it does not continue so long as in Anthoceros. 





be 



-^ 



•- « 



^v8 

 " X 



S 





< 



o 



J3 



(5 



The assimilative system of tissue in the latter is finally com- 

 pleted by the development of perfect stomata, and the growth 



