‘LUTHER BURBANK 
phenomena of “dominance” and “recessiveness”— 
in a word, that heredity is a somewhat larger term 
than Mendelism, and that the biologist or botanist 
or plant developer who would gain a really clear 
conception of the situation must clearly distinguish 
between the lesser term and the greater, although 
at the same time recognizing that one is an essen- 
tial sub-structure of the other. 
So Darwinian heredity, which recognizes the 
heritability of whole coteries of characters that are 
too profoundly fixed to Mendelize, is again receiv- 
ing recognition; and the multitude of special 
studies of the past decade that were inspired by 
the rediscovery of Mendel’s work and by the ex- 
ploitation of his formula will take their place as 
interesting additions to the minutia of the scheme 
of heredity, without being supposed by any one, 
except here and there a victim of mental strabis- 
mus, to represent the full measure of the great 
mysteries of inheritance. 
We have had occasion in successive chapters to 
present again and again illustrations of the type of 
hereditary transmission that lends itself to classi- 
fication under the Mendelian notation. We shall 
catch further glimpses of it-before we are through. 
Here it seems worth while, in connection with the 
story of the hybrid walnuts, to attempt a more 
comprehensive view of the entire field of heredity, 
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