Review on the megastrobilus theories of conifers A New Morphological Interpretation of the Female Reproductive Organs in Ginkgo biloba L., with a Phylogenetic Consideration on Gymnosperms On the Current Classification System of Paleozoic Seeds Characteristics of Wood Structure in Gymnosperms and Their systematic Significance In V itro Pollen Germ ina tion and Pollen Tube Growth of P inus thunbe rgii Microtubule Organization in Germinated Pollen of Pinus thunbergii Highly Universal DNA Barcoding Primers of ITS2 for Gymnosperms* A Floristic Analysis on the Gymnosperms of Fujian Province Cytological Mechanism of Cytoplasmic Inheritance in Pinus tabulaeformis: II. Transmission of Male and Female Organelles During Fertilization and Proembryo Development Molecular Evolutionary Patterns of the psbA Gene in Gymnosperms Analysis on Composition of Pollen Exine and Pollen Morphology in Five Species of Gymnosperm Research Progress in Pollination Drops of Gymnosperms Anatomical reinvestigation of Archaeopteris macilenta from the Upper Devonian (Frasnian) of South China The Seedling Types of Gymnosperms and Their Evolutionary Relationships