关键词: 芒苞草, 花药, 小孢子, 雄配子体, 胚珠, 大孢子, 雌配子体, 多糖物质

Abstract: The mature ovule of Acanthochlamys bracteata is anatropous, tenuinuce-llate and bitegmic. The placenta belonges to a transition type between lateral and axile placenta. The embryo sac develops according to the mon-osporie polygonum type. The mature embryo sac comprises an egg apparatus, a central cell with two polar nuclei and three antipodal cell.The synergid is oboearshaped, having the hooked filiform apparatus atthe micropylar end, and the cytoplasm of synergid is not polarised. Thetwo polar nuclei of central cell fuse to form a secondary nucleus beforefertilization. The anther is bisporangiate, and the anther wall is of the monocotyle-clonous type with glandular tapetum. The cytokinesis in the microsporemother cell during meiosis is successive. The microspore tetrads are iso-bilateral. The mature pollen grains are two-celled. The accumulation and disappearance of polysaccharide grains showregular changes during the anther and ovule development.

Key words: Acanthochlamys bracteata, Anther, Microspore, Male gametophye, Ovule, Macrospore, Female, gametophyte, Polysaccharide grains