114 



On Flowers and Insects. 



reference to other flowers. Let us see whether we 

 can throw any light upon them. 



Before, however, proceeding further, let me briefly 

 mention the terms used in describing the different 

 parts of a flower. 



If we examine a common flower we shall find that 



Fig. 24. MEADOW GERANIUM (Geranium pratense}. 



it consists, firstly, of an outer envelope or calyx, 

 sometimes tubular, sometimes consisting of separate 

 leaves called sepals ; secondly, an inner envelope or 

 corolla, which is generally more or less coloured, 

 and which, like the calyx, is sometimes tubular, 

 sometimes composed of separate leaves called 



