450 VEGETABLE PHYSIOLOGY 
of the nucellus of the ovule, the buds growing into the 
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. 
