C3LASSBS. 65 



CHAP. I. 



CLASSES AND ORDERS. 



I. CLASSES, (classes.) 



THE CLASSES of Linnseus are twenty-four, and 



their distinctions are founded on the number, situation 



or proportion of the stamens. Their names are of 



Greek derivation, and are expressive of their characters. 



The first eleven are characterized solely 



liy the number of the Stamens. 

 Plate 15 contains figures of the 24 classes. 



1. MONANDRIA, 1 stamem. Ex. Glass wort, Sail- 

 cornia. 



Observation A small class. 



2. DIANDRIA, 2 stamens. Ex. Lilac, S-yringa. 



3. TRIANDRIA, 3 stamens. Ex. Blue Flag, Iris. 

 Most of the grasses belong to this class. 



4. TETRANDRIA, 4 stamens. Ex. Plantain, Plan- 

 tago. 



5. PENTANDRIA, 5 stamens. Ex. Thorn-apple, 

 Datura. 



Observationon. A numerous class* 



6. HEXANDRIA, 6 stamens. Ex. Lily, Lilium. 



7. HEPTANDRIA, 7 stamens. Ex. Trientalis. 



Observation, A very small class. 



8. OCTANDRIA, 8 stamens. Ex. Primrose, CE.no- 

 them. 



9. ENTOANDRIA, 9 stamens. Ex. Sassafras, Laurus. 



Observation. A small class. 



10. DECANDRIA, 10 stamens. Ex. Pink, Dianthus. 



11. DODECANDRIA, 12 to 19. Ex. Canada Snake- 

 root, Marum. 



By Number and Insertion. 



12. ICOSANDRIA, 20 or more stamens inserted into the 

 calyx. Ex, Apple, Pear, Cherry, Plum, Raspberry, 



