402 



XXIX. THE GYNCECIUM OF ANGIOSPEKMS. 



have already dehisced, we shall find the ovules in part fully 

 developed and not yet fertilised, in part already fertilised. Be- 

 tween the ovules we come often upon fragments of pollen-tubes. 



The receptive ovule has the appearance of the adjoining Fig. 

 146. It is transparent, and can be focussed for optical section. 



V 27 



We recognise it as an anatropous ovule, with but one integument 

 (i). The whole interior of the ovule is filled by the embryo-sac ; 

 we miss the nucellus, which, during development, is pressed back 

 by the embryo-sac. The apex of the embryo-sac is occupied, as 

 we can clearly see, by three cells. These three cells form the 

 egg-apparatus or germinal apparatus. They are not of equal 



