Heald, Fred De Forest, 1872- 



Gametophytic regeneration as exhibited 

 by mosses, and conditions for the germlna- 

 tion of cryptogam spores... 1897. 



*■/. 



QK 



535 



H43 



1897 



Bot. 



. <p 



mm 







,-■"*■ ■ 



