. Elementary botany . Fig. 304, Two- ami four-celled stage of embryo-sac of lilium. The middle one shows di ision nuclei to form the four-celled stage. (.Easter lily.) sperms, and in the angiosperms, fertilization, as we have seen, consists in the fusion oi a male nucleus with a female nucleus. Fertilization, then, in plants is identical with that which takes place in animals. 458. Embryo.—After fertilization the egg develops into a short row of cells, the suspensor of the embryo. At the free end the embyro develops. In figs. 309 and 310 is a young embryo of trillium. 459. Endosperm, the matu
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