CLASSES. 25 



Class 16. Monodclphia, stamens all united by their 

 filaments, fig. 5. 



17. Diadelphia, stamens divided into two 



distinct sets, each set united by 

 the filaments, fig. 6. 



1 8 . Polyadelph ia, stamens divided into many 



sets, fig. 7. 



19. Syngenesia, stamens united by the an- 



thers, which in their union form a 

 tube, the filaments being distinct ; 

 ^oi^^r* compound, fig. 1, pi. 19. 



The Twentieth class, Gynandria, by the stamens 

 being inserted into the pistil, fig. 2. 



The Twenty-first, Twenty-second, and Twenty- 

 third classes, by the stamens and pistils being in 

 separate flowers. 



Class 21. Monoecia, stamens andpistils in separate 

 flowers on the same plant, fig. 3. 



22. Dioecia, stamens and pistils in separate 



flowers, on two distinct plants, 

 fig. 4. 



23. Polygamia, stamens and pistils united in 



some flowers and separate in 

 others, on the same or on different 

 plants. 



The Twenty-fourth class, Cryptogamia, comprises 

 all plants, the fructification of which is so ob- 

 scurely formed, that no stamens are apparent. 



