Studies on Microsporogenesis and Development of Male Gametophytes in Endangered Species Glyptostrobus pensilis Study on the Growth Dynamics of Dominance of the Relict Plant Glyptostrobus pensilis Population The Population Life Table and Periodic Fluctuation of the Relict Plant Glyptostrobus pensilis Megasporogenesis, Female Gametophyte Development and Embryogenesis in Critically Endangered Glyptostrobus pensilis Anatomy of Secondary Phloem of Glyptostrobus in Relation to Its Systematic Position Study on the Total Flavonoids Content in Leaves of Glyptostrobus pensilis