LUTHER BURBANK 
But while the specific qualities of peach and 
almond, representing their specialized develop- 
ment in comparatively recent times, thus tend to 
be segregated along Mendelian lines, yet the traits 
in each case are of such long standing that they do 
not Mendelize in the clear and satisfactory way 
that we have seen manifested in some other cases 
—for example, the color of the blackberry, and its 
thorns. 
There is, to be sure, a very marked segregation 
in the second generation, illustrated by the most 
astonishing variation among different second gen- 
eration hybrids in the matter of size, rapidity of 
growth, and almost every quality of flower and 
fruit. 
This variation was so marked, indeed, as to 
rob the seedlings of the value they might other- 
wise have had as stock for grafting. The large- 
growing specimens have value for this purpose, 
but the diversity among the seedlings is so great 
that they cannot at present advantageously be 
grown with any hope of producing dependable 
stocks. 
In the matter of the fruit, the second genera- 
tion hybrids are equally variable. There are some 
specimens that tend to reproduce the almond qual- 
ity and others that tend to reproduce the peach 
quality. And as might be expected there are yet 
[80] 
