120 



THE SECOND BOOK OF BOTANY. 



What numbers have occurred oftenest in your 

 written descriptions of flowers ? When you describe 

 a flower, observe always what figures you use in 

 numbering its parts, and decide what number the 

 plan of the flower is based upon. 



EXERCISE XLII. 

 Alternation of Parts in Flowers. 



Figs. 262 and 263 represent the stamens and pis- 

 til of the flower shown in Fig. 261. Does this picture 



Fio. 261. 



FIG 



FIG. 263. 



