138 



THE PLANT CELL. 



This is an instance of polyem'bryony, a phenomenon which 

 occurs in some Angiosperms, notably Funkia cordata. The 

 other embryonal cells, as a rule, form embryos which are later 



Fig. 106. — Embryo - sac of Pinus, showing Elongation of the 

 SusPENSORS. — 1, Basal cells, which probably form pabulum for the 

 others, or else abort ; 2, the auspensor cells, greatly eloDgated ; 

 3, the pro-embryonal cells, one of which will become an embrj'O- 

 plant by svibsequent division ; osp, remains of the oospore in the 

 archegonium. 



