ClipArt ETC
"Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells. L, later stage in the embryo-sac, an, antipodal cells, em, beginning of the embryo by division of fertilized egg cell; five dividing nuclei descended from primary endosperm nucleus." -Stevens, 1916

Megaspore Formation Stage 12

"Stages in the formation of the megaspore, its germination, fertilization of the egg and endosperm cells.…