LUTHER BURBANK 
stigma and the pollen bundles are separate and 
single, too; but in another orchid which has two 
receptive stigmas, the pollen bundles are in doub- 
lets, held together with a strap. 
Thus the insect visiting this second orchid 
carries away two pollen bundles on its forehead, 
each so nicely piaced that their dust will reach 
both sticky stigmas of the next flower entered. 
Similarly, the pollen of the milkweed is stored 
in two little bags, connected by a strap. When 
the bee visits the flower its feet become entangled 
in this strap and when it leaves it carries both bags 
with it. 
And so, throughout the whole range of plant 
life, each fresh investigation would show a new 
display of ingenuity—infinite ingenuity directed 
toward the single end of combining the tendencies 
of two lines of heredity—so that the offspring may 
be different from and better than the parent. 
We should see that there are those flowers 
which bloom only in the night. Flowers which, as 
if having tried to perfect a lure for the insects of 
the day, and having failed, have reversed the order 
of things and send forth blossoms of white or 
yellow—luminous colors always—to attract the 
moths that fly after the sun goes down. 
We should find many interesting half hours 
[86] 
