THE EVOLUTION OF THE FLOWER 131 



as the result of cultivation, having a bearing upon 

 the evolution of the flower, is the variety of 

 Campanula known as the " Cup and Saucer. " 

 As in the case of the Gloxinia, the five united 

 petals go to the making of one bell, the five 

 sepals being more or less joined together, but, 

 of course, external to the corolla. In the form 

 under notice it is the joined petals which go to 

 the making of the cup, whilst the broad, flattened- 

 out, abnormal calyx is responsible for the saucer. 

 In this case the sepals have lost their green 

 tinting, and have become blue or white as the 

 colouring of the corolla may be. This is only one 

 amongst many interesting forms which the 

 gardener can find amongst plants which are in 

 general cultivation. 



