LUTHER BURBANK 
peculiarities of the soil and the air in which it 
grew, and to its plant, insect, and animal neighbors 
—so that it became a thriving, successful race, 
each generation a little stronger—each year seeing 
it increase in numbers and spread in territory. 
In its spread, we may well imagine that the 
winds, or the animals, carried its seed over 
otherwise impassable barriers—just as human 
environment carries one son to New York to 
become a lawyer, another to Pittsburg to become 
a steel maker, and another to the gold fields of 
Nevada. 
Thus reaching out, always into new environ- 
ments, some branch of this daisy family found 
itself in the midst of a clump of trees—trees which 
multiplied and grew till they obscured the sun 
and left the tiny plants in the obscurity of dense 
shade. 
As the trees grew (and just as slowly, quite 
likely), the daisies at their feet accommodated 
themselves to their new environment — they 
adapted themselves to the shade and moisture— 
they had less competition, perhaps, from other 
small plants and so became less sturdy—they 
changed their color to the one best suited to 
attract available messengers of reproduction. 
At this point we interrupted the evolution of 
the African daisy by planting the white and the 
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