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POPULAR SCIENCE MONTHLY. 



Descendants of hybrids usually revert to either one or the other 

 parent or break up in all directions. A cross of the eastern black 

 walnut (Juglans nigra) with the California nut (J. calif ornica) yields 

 a hybrid which is a very great grower. From the seed of this tree a 

 surprising variety of mutations are developed, not only resembling 



Leaves from Second Generation Seedlings from Cross of Common Persian Walnut 

 (Juglans reyia) and California Native Walnut. 



every possible combination of both parents but numerous strange 

 forms. In fact, among about two thousand seedlings now alive, almost 

 every type or form of walnut foliage may be found. There are start- 

 ling variations in size, form and number of leaflets, in the size of the 

 plant, in the serration of the margins, in the degree of roughness of 

 the surface, in every feature in which one walnut may differ from 

 another. 



