[Objective]To study megasporogenesis and female gametophyte development of T.fournieri.[Method]Megasporogenesis and female gametophyte development of T.fournieri were investigated by techniques of paraffin sections and ultra-thin sections.[Result]T.fournieri had axile placenta.The ovule was anatropous,unitegmic and tenuinucellatae.The megasporocyte divided into T-tetrad or linear tetrad after meiosis.The chalazal end megaspore was functional in T-tetrad and the embryo sac was the polygonum type.However,the ...