LUTHER BURBANK 



there because of its resemblance to the apricot. 

 Besides the varieties that have been introduced, 

 I have some thirty other selected varieties that 

 have been given temporary names, for further 

 testing. Some of these will doubtless be intro- 

 duced if, as expected, they prove of value. 



Hundreds of other seedlings are being tested 

 but have not developed sufficiently to give a very 

 definite idea of their qualities. 



HYBRIDIZING THE PLUMCOT 



Now that the plumcot race has been thoroughly 

 established, it is necessary to make further crosses. 



The obvious way to obtain improved varieties 

 is to cross the best seedlings of those already pro- 

 duced. This is being done every year. Seeds of 

 all of the plumcots grown on my place in 1912 

 were saved and planted; possibly two thousand 

 of these seedlings being grown. 



One of my named varieties that has not been 

 introduced is perhaps the most prolific fruit tree 

 ever produced. The seeds from this are being 

 saved separately. It is probable that the seedlings 

 grown from this variety will be remarkable 

 producers. 



By crossing some of the plumcots with the Pru- 

 nus pissardii plum, some purple leaved plumcots 

 have been secured. This characteristic of dark foli- 

 age is readily transmitted in the plumcot cross as 



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