Study on Anatomical Structure of Leaves of Rare Plant Emmenopterys henryi Oliv. Studies on Four Kinds of Isozymes during Somatic Embryogenesis of Emmenopterys henryi Oliv Studies on Chemical Constituents of Emmenopterys henrys Oliv. Native to China Cytology Research on the Flower and Embryo Development of Emmenopterys henryi Oliv In Vitro Conservation of Rare and Endangered Emmenopterys henryi Oliv. Germplasm