34 BOTANY FOR YOUNG PEOPLE. 



course, necessary to select such as are constant 

 in both genus and species. The roots, trunk, 

 and brandies, may all furnish specific differ- 

 ences, while the nectary and other important 

 rrgans, are selected for the generic. 



L. In how many genera are these 100,000 

 species divided ? 



E. There are now over 6000 genera described. 



L. Is there any still higher mode of classifica- 

 tion by which the genera are combined together ? 



E. Yes ; into orders, and these again com- 

 bine to form classes. Can you repeat the names 

 of the different divisions ? 



L. Species, Genera, Orders, and Classes. 



E. That is right. It is now my intention to 

 take each class separately, mention how ita 

 orders are formed, and notice some of the flow- 

 ers belonging to it. I will, before commencing, 

 give you a general idea of the Linnean System 

 of Classification. The first ten classes are 

 known by the number of single stamens in a 

 flower, for instance, if there is one stamen it is 

 in the first class ; two stamens place it in the 

 second class, and so with the others, until you 

 arrive at ten. What class was the Pink in we 

 analysed ? 



