25« LUTHER BtTlBAXK 



because, generally tpe<iK...^. ,i ,. these alone that 

 put forth bloMomt that pUasc the eye. 



W'^hoerer is interested to iiiulertake expen 

 iitents in plant breeding iicii, familiarize 



himself with the medi; ' h the i" 



rtmlf.v known its appc». . . ^ct and li. ■ 



t 1 which the per|>etuation of its kind i 



effected; the mechanisms, that is to say. of tlf 

 typical flower. 



As We come to study flowers m aciuii, it 

 will appear that among those dependent un>^<< 

 insect fertilizers, no less than among the n\ 

 fertilized, there are individuals tliat bear the 

 essential organs of the flower in separate bios- 

 aoms. Reference was made to this in the case 

 of our crossing experiment with a certain species 

 of dewberry, and we shall see other illustrations 

 of it from time to time. 



But the major part of the most familiar culti- 

 vated plants, including all the conspicuous fruit 

 trees of our orchards, bear flowers each of whicli 

 contains within the same blossoms both the stam- 

 inate and the pistillate organs. 



Ordinarily it is the function of tlie bee t»> 

 carry pollen from one blossom to the pistil o: 

 another. But on occasion even these flowers ma> 

 be self-fertilized. Thus it may be said that the 

 most important, from a human standpoint. 



