92 



EVOLUTION AND ANIMAL LIFE 



Burbank has originated and introduced a remarkable series 

 of plums and prunes. No less than twenty varieties are included 

 in his list of offerings, and some of them, notably the Gold, 



Fig. 57. — Four types of plumcot: colors, red and yellow of various shades. (Photo- 

 graph by Burbank; about one-half diameter.) 



Wickson, Apple, October Purple, Chalco, American, and Climax 

 plums and the Splendor and Sugar prunes, are among the best 

 known and most successful kinds now grown. In addition, he 

 is now perfecting a stoneless plum, and has created the inter- 



FiG. 58. — Seedlings from one hybrid plum. (After photograph by Burbank.) 



esting plumcot b}^ hybridizing the Japanese plum and the 

 apricot. The plumcot, however, has not yet become a fixed 

 variety and may never be, as it tends to revert to the plum. 



