INFLORESCENCE AND FLOWERS FRUIT AND SEED 129 



down in its apex also a nucleated mass of protoplasm, 

 and it passes this over into the egg-cell in the embryo- 



FIG. 35. Various stages in the development of the ovule. 

 n, nucellus ; ?., i', integuments ; p, point of attachment 

 to placenta ; e, embryo-sac ; r, vascular cord supplying 

 ovule ; TO, micropyle ; a?, young embryo. (Partly after 

 Th. Hartig.) 



sac ; the union of the nucleus from the pollen-tube 

 with the nucleus of the egg-cell constitutes the act of 



K 



