LUTHER BURBANK 



unlike either parent. But in the succeeding gen- 

 eration the offspring of the black bean broke up 

 into new groups, some of them producing black 

 beans, some red, some speckled, and some white. 

 There were corresponding variations as to size 

 and shape of the beans, and as to time of 

 ripening. 



Meantime the hybrid vines showed the enhanced 

 vitality that is somewhat characteristic of hybrids. 

 They grew enormously, outstripping their parent 

 by eight or ten feet. 



But the vines of the second generation were 

 extraordinarily diversified, some of them growing 

 with great vigor and others being dwarfed, and 

 of such stocky growth that their pods trailed the 

 ground. 



In another experiment Mr. Burbank hybrid- 

 ized the pole bean and the lima bean, and the 

 hybrid showed at first the characteristics of both 

 parents, but subsequently took on the form of 

 the pole bean. Mr. Burbank notes that this case 

 is somewhat comparable to that in which he hy- 

 bridized the strawberry and the raspberry. In 

 that case the vines were at first like the straw- 

 berry, and then shot up like raspberry plants. 

 The case of the hybrid beans that showed both 

 gigantic and dwarfed progeny in the second gen- 

 eration is comparable to that of Mr. Burbank 's 

 hybrid walnuts, in which some individuals of the 

 second generation grew ten times as fast as 

 others. 



In more recent years Mr. Burbank has hybrid- 

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