SUMMARY OF THE WORK 337 



same page with the smaller nuts of the ancestral 

 forms. And it was particularly noted that the 

 new hybrid had borne nuts in abundance, 

 although the other hybrid walnut, due to the 

 union of the California and Persian walnut, had 

 not then borne fruit. 



It may be added that the relative infertility of 

 hybrids between forms distantly related is recog- 

 nized in the course of the description of this ' 

 second hybrid walnut, in the statement that in 

 its failure to bear fruit it is like many true 

 hybrids; the writer having doubtless in mind 

 such examples as those furnished by the new 

 plant called the Nicotunia, a combination of the 

 tobacco and the petunia, which is described on 

 another page of "New Creations"; and the 

 equally interesting hybrid between the raspberry 

 and the strawberry, also described and depicted. 



These sterile hybrids, with which the reader 

 of the present work is already familiar, illustrate 

 another aspect of heredity no less interesting; 

 but at the moment we are concerned with the 

 fertile hybrids. 



And these, it may be added, include all the 

 fifty-odd plants described in the catalogue, with 

 the three exceptions just noted. 



Without entering into specific details, we may 

 briefly note that the new hybrid plums here 



