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RESEARCH ON THE BASIC ELEMENTS AND MAIN FEATURES OF PTERIDOPHYTES FLORA IN HUBEI PROVINCE Additions to Fern Flora in Guangdong Province, China Study on the pteridoflora in Southwest of Zhejiang Province Preliminary study on the fern resource and flora in Jinfo Mountain A STUDY ON THE SPECIES DIVERSITY OF PTERIDOPHYTES FROM THE LAOJUN MOUNTAIN NATURE RESERVE, SE.YUNNAN THE FLORISTIC CHARACTERISTICS OF THE XIZANG (TlBET) PTERID0PHYTE FLORA IN RELATION TO THE UPHEAVAL OF THE HIMALAYAS Pteridophyte flora in Taibaishan Nature Reserve of Shaanxi Province Effect of 60Co-γ rays Irradiation on Shooting From the Green Globular Bodies in Pteridophyte