SOME EXPEELMEXTS OF LUTHER BURBANK, 



15 



less, one of them bearing rose-colored flowers. From the mountain ash 

 and blackberry a salmon-colored fruit with no thorns and no albumen in 

 the seed was developed. A hybrid between the English and the black 

 walnut grows fully four times as 

 fast as the English walnut ; it 

 bears little fruit. The seedlings 

 from the fruit produce some Eng- 

 lish, some black, and some hybrid 

 walnuts, and not rarely entirely 

 new forms. Crossing often 

 brings about great vegetative life 

 at the expense of reproductive 

 life, or the reverse. The young 

 (second generation) hybrids of 

 the black walnut and the English 

 walnut show very great variation 

 in their leaves, resembling neither 

 parent. The hybrids of the Eng- 

 lish and California black walnuts 

 are most rapidly growing trees 

 and unusually productive. The 

 first hybrid, of the English with 

 the Japanese walnut, Juglans 

 sieboldi, is largely like the Japa- 

 nese in the nuts, but rather more like the English in foliage, the second 

 generation being very variable as usual. 



By crossing types already crossed, we may often bring out the 

 original stock which had been lost in cultivation. The English walnut 

 has usually five leaflets, the black walnut fifteen to nineteen. The first 



The Original and Improved (Shasta) 

 Daisy. 



Japan Walnut. Result of Cross of the Two. English Walnut. 



generation hybrid has eleven, with a fragrance to the leaves that no 

 original walnut has. This tendency or trait is just as real as any 

 other. The American walnut (Juglans nigra) and the California black 

 walnut (J. calif ornica) are closely related species and when hybridized 

 yield fruit of very large size and in enormous quantities. 



