SYSTEM OF fcWKJEUS. 241 



12. Icosandria has numerous stamens inserted into 

 the calyx as in Spirea and Strawberry. 



13. Polyandria, has numerous stamens inserted into 

 the receptacle, or base of the flower. 



The fourteenth and fifteenth classes are distinguish- 

 ed by the number and proportion of the stamens. 



14. Didynamia has four stamens, of which two are 

 long, and two are short, as in Gerardia and the Labiate 

 flowers. 



15. Tetradynamia, has six stamens of which four 

 are longer than the two others, as in Iberis and Wall 

 flower. 



In some flowers the stamens are connected into^one 

 ormore parcels. 



16. Monadelphia has them united by their filaments 

 into a tube, as in Geranium and Mallows. 



17. Diadelphia has its stamens united into two bun- 

 dles, as in Vicia, Lathyrus, and most of the Papiliona- 

 ceous flowers. 



18. PolyadelphiahRS its stamens united into several 

 bundles, as in the Hypericum, and in the Orange and 

 Lemon. 



19. Syngejiesia has the stamens united by their an- 

 thers into a tube, as in Cacalia and Dandelion. 



20. Gynandria has the stamens united to the pistil, 

 and inserted either in the style or germen, as in Or- 

 chis and Ladies* slipper. 



In the preceding classes the stamens and pistils oc- 

 cur in the same flower, but in some instances they are 

 separated, either on the same or on different plants. 



21. Monoecia has stamens on the same plant with the 

 pistil, but not in the same flower, as in Ricinus and 



Oak. 



22 



