THE INFLORESCENCE AND FLOWER. 51 



Fig. 159 shows this tube laid open. Those that have 

 grown together by their filaments have to be further studied. 

 Are all the filaments grown together in one bundle ? If so, 

 the stamens are monadelphous (Fig. 162). 



FIG. 162. 

 Monadelphous Stamens. 



FIG. 163. 

 Diadelphous Stamens. 



FIG. 164. 

 Tri- or Polyadelphous Stamens. 



FIG. 165. Polyadelphous 



Are they grown together in two bundles ? Then they 

 are diadelphous (Fig. 163). 



Are they in three or more bundles ? Then we say they 

 are polyadelphous (Figs. 164 and 165). Fig. 164 has one 

 bundle cut away. 



The number and length of the hard words in this exer- 

 cise may discourage pupils, but by use they will become 

 familiar, and they will then greatly help the process of 

 description. 



