Harry Marshall Ward,
The Oak
(1892)
“ We are now in a position to understand generally the changes that convert the female flower into the cupped acorn. The fertilized oöspore becomes the embryo (Fig. 35, x) ; it grows at the expense of the contents of the embryo-sac, and develops a radicle, a plumule, and two relatively large cotyledons, which soon become so big that they occupy the whole space in the sac (Fig. 36) . Moreover, the embryo-sac increases to make more room for this growing embryo. And now comes in a curious point. We saw that the ovary consisted of three chambers, each containing two ovules ”
