Chap. IV. 



ESCHSC1I0LTZIA CALIFOKNICA. 



109 



no difference. When fully grown, the flower-stalks were 

 measured to the summits of the seed capsules, with the follow- 

 ing result : 



Table XXXIII. 



Papaver vagum. 



The fifteen crossed plants here average 21 91 inches, and the 

 fifteen self-fertilised plants 19 ' 54 inches in height, or as 100 tc 

 89. These plants did not differ in fertility, as far as could be 

 judged by the number of capsules produced, for there were 

 seventy -five on the crossed side and seventy-four on the self- 

 fertilised side. 



ESCHSCHOLTZIA CALIFOENICA. 



This plant is remarkable from the crossed seedlings not ex- 

 ceeding in height or vigour the self-fertilised. On the other 

 hand, a cross greatly increases the productiveness of the flowers 

 on the parent-plants, or, as it would be more correct to say, self- 

 fertilisation lessens their productiveness. A cross is indeed 

 sometimes necessary in order that the flowers should produce 

 any seed. Moreover, plants derived from a cross are themselves 

 much more fertile than those raised from self-fertilised flowers 



