30 



THE SECOND BOOK OF BOTANY. 



give at the same time their number T the fact that they 

 are distinct, and the proportion of long to short ones. 

 Can you find upon the charts any flowers with 

 tetradynamous stamens ? Have any of them didyna- 

 mous stamens ? 



EXERCISE IX. 

 The Growing together of Stamens. 



Having disposed of all your flowers with distinct 

 stamens, next examine those with united stamens. 



First observe whether they have grown together 

 by their filaments, or by their anthers. All those 

 having their anthers united, whether into a tube, 

 around the pistil, or in any other way, may be put 

 together and labelled syngenesious (Figs. 25 and 26). 



FIG. 24, 



FIG. 25. 



Syngenesious Stamens, 



Syngenesious Stamens. 



