Review of Reproductive Characters in Ginkgo and Cycads Observations and study on the pollen morphology of some taxa of Miscanthus (Poaceae) RESEARCHES ON THE FORMATIVE COURSES OF THE SPIKE COLLAR OF WHEAT IN SYSTEMATIC EVOLUTION AND INDIVIDUAL DEVELOPMENT Pollen morphology of the Tamaricaceae from China and its taxonomic significance THE SYSTEMATIC EVOLUTION OF CORYDALIS IN RELATION TO FLOROGENESIS AND FLORISTIC REGIONALIZATION IN THE WORLD A SYSTEMATIC AND EVOLUTIONARY STUDY OF ZIZANIA L. (GRAMINAE)——EMBRYO MORPHOLOGY A Systematic and Evolutionary Study of Zizania L. (Gramineae) Pollen Morphology Cladistics of Heracleum in China A Review on Studies of Systematic Evolution of Gynostemma Bl. A Cytological Study of Seven Species in Section Proliferae of Primula(Primulaceae) Systematic Evolutional Relation of Chemical Components of the Essential Oils from 11 Taxa of Citrus Leaves Screening and Preparation of Aptamer and Its Analytical Application A STUDY ON CLADISTIC TAXONOMY OF ZIZANIA L.(Gramineae) A SYSTEMATIC AND EVOLUTIONARY STUDY OF ZIZANIA L. (GRAMINEAE)——CHEMICAL COMPONENTS OF THE HERB POLLEN MORPHOLOGY OF SEVERAL SPECIES FROM MICHELIA(MAGNOLIACEAE) THE OCCURANCE AND ORGANOGENSIS OF MIXED BUD OF LIRIODENDRON GHINENSE Ecological and geographical distribution of Keteleeria and its systematic evolution in China