EEPROBUCTION BY SEED 



179 



In the raceme (Fig. 75) the youngest flowers are 

 at the apex. In some cases the stalks of the flowers 

 are so adjusted in length that aU the flowers are 

 brought to the same level — e.g., the corymb of the 

 Crucifers (Fig. 76). The whole mass of small flowers 

 is thus made more conspicuous. After fertilization 

 the axis of the inflorescence lengthens, separating 



FlO. 75. DlAORAM Off 



Raceme. 



Fio. 76. — ^Diagram op 



COBYMB. 



the fruits. When the flowers of the raceme are 

 separa,ted by long internodes they are large — e.g., fox- 

 glove. 



The number of flowers is increased when the axis of 

 the raceme branches, and this type — the panicle — is found 

 in the lilac and horse-chestnut among insect-pollinated 

 flowers, and many grasses among the wind-pollinated 

 ones. In the clovers and medicks the axis is short, and 



