X 
Cl. 4. 
Cl. 5. 
Cl. 6. 
Cl. 7. 
Cl. 8. 
Cl. 9. 
Cl. 10. 
Cl. 11. 
Cl. 12. 
Cl. 13. 
Cl. 14. 
Cl. 15. 
Cl. 16. 
Cl. 17. 
Cl. 18. 
Cl. 19. 
Cl. 20. 
Cl. 21. 
Cl. 22. 
Cl. 23. . 
Cl. 24. 
Tetrandria. 4 free stas of equal length, in a herma¬ 
phrodite flower. 
Pentandria. 5 free stas in a hermaphrodite flower. 
Hexandria. 6 free stas of equal length (or 3 longer 
and 3 shorter) in a hermaphrodite flower. 
Heptandria. 7 free stas in a hermaphrodite flower. 
Octandria. 8 free stas in a hermaphrodite flower. 
Enneandria. 9 free stas in a hermaphrodite flower. 
Decandria. 10 free stas in a hermaphrodite flower. 
Dodecandria. 12—18 free stas in a hermaphrodite fl. 
Icosandria. 20 or more free stas inserted on the calyx 
in a hermaphrodite flower. 
Polyandria. 20 or more free stas inserted on the re¬ 
ceptacle in a hermaphrodite flower. 
Didynamia. 4 free stas, 2 longer and 2 shorter, in 
a hermaphrodite flower. 
Tetradynamia. 6 free stas, 4 longer and 2 shorter, 
in a hermaphrodite flower. 
Monadelphici. All the stas of a hermaphrodite flower 
united at the base. 
Diadelphia. The stas of a hermaphrodite flower united 
at the base in 2 bundles, or 1 free, the rest united. 
Polyadelphia. The stas of a hermaphrodite flower 
united at the base in more than 2 bundles. 
Syngenesia. Anthers of (5) stas united in a tube 
round the style. 
Gynandria. Stas united with the style in a column. 
Monoecig. Flowers all unisexual; male and female on 
the same plant. 
Dioecia. Flowers all unisexual; male and female on 
different plants. 
Polygamia. Flowers partly hermaphrodite, partly uni¬ 
sexual. 
Cryptogamia. Plants without distinct flowers. 
Summary of the principal divisions 
of the Natural System. 
I. Phanerogams. 
A. Angiosperms. 
a) Dicotyledons. 
1. Polypetalee. 
* Hypogynous polypetalee. 
Fam. 1—24 inch (Ranunculacese—Rutaceee). 
* Perigynous polypetalee. 
Fam. 25—53 (Celastrace® — Loranthacere). 
