THE NATURAL SYSTEM. 253 



eighteenth, by the connection of their filaments, or 

 the lower part of the stamen ; and the nineteenth, by 

 that of their anthers, or the crown of the stamen. 

 The twentieth class is distinguished by the relative 

 position of stamen and pistil. The succeeding three 

 classes depend upon the separation of the stamens 

 and pistils in separate blossoms or on different plants. 

 The twenty-fourth, on the absence of these organs 

 altogether. The subdivision into classes depends 

 entirely on the number of pistils in each flower. 



This arrangement will be clearly understood by a 

 glance at the detailed arrangement. Thus they stand: 



Class. 



1. Mbnandria, or one stamen in each flower. 



2. Diandria, two stamens. 



3. Triandria, three stamens. 



4. TetrctinJria, four stamens. 



5. Pentandria, five stamens. 



6. Hexandria, six stamens. 



7. Heptandria, seven stamens. 



8. Octandria, eight stamens. 



9. Ewneandria, nine stamens. 



10. Decandria, ten stamens with the filaments 



united. 



11. Dodecandria, twelve to nineteen stamens in- 



serted in the receptacle or base on which the 

 parts of the flower are placed. 



