SOME EXPERIMENTS OF LUTHER BURBANK. 211 



Leaves of Blackberry-Raspberry Hybrids. 



usually come out strong in the descendants. Ordinary hybrids of forms 

 closely related generally form a perfect blend from both parents. 

 V\ 7 hen the parents are far apart all sorts of variations occur, the so- 

 called Mendelian condition being one phase of the results. 



Hybridizing the iceberg white blackberry with the Cuthbert raspberry 

 develops a plant with foliage and growth midway. About half the 

 plants bear fruit which is red like the raspberry, about half bear fruit 

 which is white like the iceberg blackberry; the quality is midway 

 between the blackberry and the raspberry. In the crossed fruit (first 

 generation) the flavor is not superior, but it is quite intermediate 

 between blackberry and raspberry. The form of the receptacle is 

 intermediate. Some of the fruitlets separate at the base, but not above. 



