Epidermal Characters of Rattan Stems and Their Taxonomic Implications Pollen Morphology of Parnassia L. (Parnassiaceae) and Its Systematic Implications Discussion on implications and research ideas of toxic theory in natural characteristics of Chinese herbal medicine Microsporogenesis and Formation of Male Gametophyte in Swertia hickinii Burk.and Their Systematical Implications Achene Morphological Features of Saussurea subg. Eriocoryne (Asteraceae) and Its Taxonomical Significance* Seed Micromorphological Characteristics of Eurya and Their Systematic Implications Sporogenesis,Gametogenesis in Zephyranthes candida and Their Systematic Significances