CROSSING FRUIT FLOWERS. 



109 



The stamens consist of anthers and filaments. The anthers contain 

 the pollen, and they open soon after the flower has expanded. The 

 pollen represents the male element, while the stigma, style and 

 ovules constitute the female reproductive organs. 



Tn some flowers pollination takes place hefore the flowers open, 

 ^, ^'o}( i')\ q rcLi lis . 





00 sjj'tx er f> 



J»iVtW ojC CO ^T»~a.ur Werro j.|owpr. 

 iSVt\y.-l^Q ^ollpntu^P enter ( n^ 1/ ule. 



Figure 1. 



as in the case of wheat. Here we have a case of self-fertilization. 

 Many flowers whose pollen is shed just when the stigma has be- 

 come receptive are also self-fertilized because their own pollen 

 has the first and best opportunity to do the pollinating. But most 

 flowers, especially fruit flowers, are polHnated by insects, and in 



