Tracheary Elements in Secondary Xylem of Actaea asiatica (Ranunculaceae) Comparative Studies of Perforation Plate Structures of Vessels in Ranunculaceae An Investigation of Vessel Perforation Plates in the Secondary Xylem of Stem of Souliea vaginata ( Ranunculaceae) Observation of Vessel Elements in Secondary Xylem of Phyllanthus emblica Research Progress in Vessel and Perforation Plate of Vascular Plants and Some Considerations for Future Research Anatomy of the Vessel Elements and Perforation Plates in the Secondary Xylem of Casuarina cunninghamiana The Type and Evolution of Vassel Element‘s Perforation Plate of Oplopanax elatus Study on tracheary elements of three genera in Athyriaceae The Wood Anatomy Study on Stem of Sambucus williamsii Comparative Study of Tracheary Elements in Peranemaceae from China Structures of the stem secondary xylem of Symplocos paniculata Structures of the stem secondary xylem of Lonicera maximowiczii The wood anatomy study of stem of Rhus chinensis Comparative studies of vessels of leptos branch and stout branch in Magnolia biloba THE TYPE AND EVOLUTION OF VASSEL ELEMENT‘S PENFORATION PLATE OF SORBUS POHUASHANENSIS Comparative Investigation of Vessel Elements in the Secondary Xylem of Liriodendron The Type of Vassel Element‘s Perforation Plate of Cornus controversa Study on the Vessel Elements and Its Perforation Plate of Secondary Xylem in Ziziphus mauritiana Comparative Investigation of Vessel Perforation Plates of Four Genera in Lardizabalaceae Studies on the Vessel Elements of Secondary Xylem in Manilkara zapota