How the Flowers IVoo the Insects 



reasons that underlie the varying structure of the 

 different organs. 



XECTARY RIDDLES 



Here, for instance, are two flowers — one with a 

 lono- and narrow ncctarv, and the cHhcr with a 



A WOOltLAXl) PATH 



broad and shallow one. The coloring, too, differs 

 greatly. What is the explanation of these vari- 

 ations ? Simply that at some point in their life 

 historv each of these dowers made a compact with 

 a different tribe of insects, to which it has ever since 

 been adapting itself. 



