The megagametophyte within the ovule of a flowering plant.

囊 Embryo sac 有花植物内雌配子体。

The larger embellum could be used as a secondary screening indicator for identifying aposporous embryo sac in Apluda mutica.

存在发达附器是水蔗草无子生殖囊特.

Vacuoles in the synergids tended to concentrate mainly in the chalazal region.There was a peak period of lipid formation in the two synergids.

三是助细胞与心相接囊壁有些部位出现十分明显突起，个别突起内有大型嗜锇体。