"I suppose that is why rose-petals are called leaves," said little Prue.
"I think it is."
"But—but don't you think a flower ought to be a principal part?" asked Davy.
"Well, it is in a way. It is a particular kind of a principal part, made for a special purpose. But after all, it is really a branch, for it comes from a bud, just as other branches do, and it comes just where any branch would come. Many times you cannot tell whether a bud is going to make a flower or just leaves until it opens. And there are a few queer flowers in the world that can hardly be told from leaves even after they do open."
II
THERE ARE EXOGENS AND ENDOGENS
THE PISTIL AND STAMENS OF THE LILY
"Now let us tell the parts of a flower. That was what we were doing when you came up," said Davy.