Eleanor Stackhouse Atkinson,
The How and Why Library — Section III
(1915)
“ How did the nuts get their hard shells, and their tough or prickly or mossy husks and cups? Just as the apple got its rosy skin, its sweet pulp and its horn-lined seed nests. The shell of a nut is like the seed nest of the apple. It is the hardened covering of the baby egg in the blossom. The cup or husk of the acorn, is really the twig on which the blossom grew. A plant can grow stem and root and bark and leaf and flower, all so very different. So it isn't hard to take a twig bud and turn it into a thorn on the rose, or a tendril on the grape vine, or a cup or husk on a nut tree. ”
