92 



THE SECOND BOOK OF BOTANY. 



FKEE-CENTKAL PLACENTATION. "When the dissepi- 

 ments, or double partitions, between the cells are ab- 

 sent, leaving the placentae and ovules at the centre, 

 and all the cells opening into one chamber, the pla- 

 centation is said to be free-central (Figs. 174, 175, 

 176, and 177). 



FIG. 174. 



FIG. 175. 



FIG. 176. 



FIG. 177. 



PARIETAL PLACENTATION is seen when the placen- 

 tae are attached to the walls, or projections from the 

 walls, of the ovary, as is illustrated in the following 

 figures (178-185) : 



