BREEDING FOR POINTS 



349 



ing species, called the Im- 

 proved Beach plum, bears 

 verv abundanth'. It is a de- 

 licious plmii of very fine flavor 

 and with a small stone. It is 

 indifferent to frost, and bears 

 under the most trying condi- 

 tions of soil and climate. 



A cross between a plum and 

 apricot has been produced by 

 Luther Burbank. It is called 

 the plumcot. He also pro- 

 duced a stoneless plum. 



Breeding for points. Seed- 

 lessness has sometimes devel- 

 oped as a mutation. The 

 seedless navel orange origi- 

 nated as a mutant in Brazil. 

 Twigs from it were grafted on 

 to ordinary orange seedlings. 

 Two of these tiny plants 

 thrived, and from them, prop- 

 agated by grafting, all of the 

 navel oranges have been pro- 

 duced. The value of vegeta- 

 tive reproduction as a means 

 of making a new species breed 

 true to t}^e is very great. 

 Since this makes use of the 

 body plasm, it will continue 

 to produce other plants like 

 itself. For instance, if a breeder has produced a large, double- 

 petaled, red-flowered dahlia, he may be sure that the bulbs of this 



The Lawton blackberry. 



The white blackberry that was crossed with 

 the Lawton blackberry. 



