24 CLASSES. 



Class 5. Pentandria, five stamens, 5, pi. 17. 



6. He.vandria, six stamens, 6. 



7. Heptandria, seven stamens, 7. 



8. Octandria, eight stamens, 8. 



9. Enneaudria, nine stamens, 9. 



10. Decandria, ten stamens, 10. 



11. Dodecandria, 12 to 19, 11. 



The Twelfth and Thirteenth classes are distin- 

 guished by the situation of the stamens. 



Class 12. Icosandria, twenty or more stamens in- 

 serted in the calyx, fig. 1, 

 pi. 18. 

 13. Polyandi^ia, twenty or more stamens in- 

 serted in the receptacle, 

 fig. 2. 



The Fourteenth and Fifteenth classes by the num- 

 ber and propoi^tion of the stamens. 



Class 14. Didynamia, four stamens, two long and 



two short, fig. 3, pi. 18. 

 15. Tetr adynamia, six stamens, four long and 

 two short, fig. 4. 



The Sixteenth, Seventeenth, Eighteenth, and Nine- 

 teenth classes, by the union of the stamens with 

 each other. 



