THE RASPBERRY 259 



By saving seeds from the white and the 

 red varieties separately, I found that they 

 bred true, each constituting practically a fixed 

 species. 



As to the vines themselves, there is very little 

 variation, the canes and foliage presenting an 

 exact balance between the raspberry and the 

 blackberry. 



The berries are not of great commercial value, 

 as the fruit, though large, is soft. I hope, how- 

 ever, to harden the berry by selective breeding, 

 and introduce a better flavor. 



Although this hybrid progeny of raspberry 

 and white blackberry may ultimately have com- 

 mercial importance, it is chiefly prized for the 

 scientific significance of its revelations. 



Descended as it is from a cross between the 

 raspberry and the blackberry, it constitutes a 

 fixed species differing radically from every other 

 Bubus known. 



So in this regard the Paradox takes its place 

 besides the Primus and the Phenomenal berries 

 as offering an impressive object lesson in the pro- 

 duction of new species by hybridization. Let it 

 be recalled, however, that the Primus was a first 

 generation hybrid, whereas the Phenomenal ap- 

 peared in the second generation, and the Para- 

 dox in the fourth. 



