25S LUTHER BURBANK 



and how persistently the plant clings to a custom 

 to which its ancestors owed their racial preserva- 

 Uon. Moreover, it has beeii obserred that th* 

 Tiolet, when transplanted to a sunny spot and 

 made acoessiUe to insects, may resume the 

 custom of growing seeds by its conspicuous 

 flowers, whereas hitlierto it had produced thenj 

 only in the inconspicuous budlike flowers which 

 never open. 



SCHSMIS TO IkSUBB POLLINATION 



It is curious to observe how insistent is tlx; 

 inherent demand for fertiliza* ' the flower, 



and how even flowers that optiMx ulvertise for 

 the insects may strive to provide for self-fcrtili- 

 ration in the event that their call remains un- 

 answered and in vain. 



The common barberry {Berberi* xmlgariM) for 

 example, opens and exposes its pollen-bearers 

 only during the bright hours of a cloudless 

 day. But in case an insect fails to \\%\X it. 

 provision is made that will insure self-ferti- 

 lization: for in due course the stamens dart 

 forward and sprinkle their pollen ovtr tlie 

 pistil. 



In the case of the fennel flower of France, 

 described elsewhere, which does not open at all, 

 the pistils bend forward when they are ripened. 



