Periodicals 

 Phenology 

 Philosophy 

 Phylogeny 



Physiological chemistry 

 Physiology, Greueral 



of tlie vegetative organs 



Plankton . . 



Plants, Diseases clue to . . 



Plastids 



Propagation, Vegetative organs 



of 1700, 



Reparative processea 

 Eeproduction, Asexual . . 



Physiology of 



Vegetative . . 



Eeproduetive organs . . 1350, 

 Eespiraticn 



Eoot 1200, 



Saprophytism 

 Schizophyee* 

 Secretory tissues . . 



Seed ' 1600, 



Selection, Artificial 



Natural 



Sexual organs, Crvptogamic 



Shoot . . .' . . . 1050, 



Societies, Eeports of 



Sporangia . . 



Cryptogamic 



