REPRODUCTION 449 



cavity of the megaspore and there developing into 

 embryos. This is not quite the same thing as the apo- 

 gamy of the Fern, as the new sporophyte arises as a bud 

 upon part of the sporangium that is, upon the parent 

 sporophyte and not upon the gametophyte. It is really a 

 curious variation of vegetative propagation. 



G G 



