_ 62 - FERTILIZATION. 



116. Ovule, Draw under the low power the prepared section of an ovary, 

 showing: wall of ovary; suture; placentas; ovule with f unicle ; integuments; nucellus; 

 embryo-sac. 



Draw the embryo-sac under the high power, showing : ovum ; synergidae ; secondary 

 nucleus ; antipodal cells. 



117. Pollination. Draw a longitudinal section through the stigma of a pollinated 

 flower, showing : tissue of style ; pollen-grains ; pollen-tubes. 



