BREEDING FOR POINTS 



349 



ing species, called the Im- 

 proved Beach plum, bears 

 very abundantly. It is a de- 

 licious plum 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 type is very great. 

 Since this makes use of the 



body plasm, it Will Continue The white blackberry that was crossed with 



the Lawton blackberry. 



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. 





