UNIT-CHARACTERS OF PLANTS 153 



The original much-branched condition of the annual sun- 

 flower and of stocks and of many other cultivated plants is 

 dominant over the unbranched condition found in certain 

 cultivated races. 



These illustrations serve to show that practically all parts 

 and structures of plants, as well as of animals, are likely to be 

 affected by unit-character variations and that combining of 

 such variations by means of crossing is a ready means of 

 producing new varieties. 



i 



