LUTHER BURBANK 
In Mexico, there is the familiar jumping bean 
tree, which calls in an insect to aid in the distribu- 
tion of its seeds. 
While these beans are still green, they are 
visited by a moth which lays her eggs in them. 
As they ripen, the grub hatches out and lives upon 
the food stored within. 
As if in partnership with the moth, the jumping 
bean tree has provided food for her offspring, so 
that the larva has plenty to eat without injuring . 
the seed within the bean. 
And the grub, as it hollows out the bean and 
jumps about within it, causes it to turn and roll— 
rolls it into a new environment—repays its family 
debt to the tree which gave it food. 
In the wooded mountains near Santa Rosa 
there grows a pine tree which has worked out an 
ingenious scheme for taking advantage of occa- 
sional forest fires to aid it in its reproduction. 
Most other trees mature their nuts or seeds and 
shed them every season. The animals may eat the 
fruit and carry the seeds afar, or take the nuts to 
new environments, or the seedlings may come up 
at the foot of the parent tree—but the process of 
seed bearing and seed shedding usually completes 
its cycle every fall. 
The pine tree referred to, however, does not 
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