Investigation on Pollen Morphology of Aconitum L. Pollen morphology of the genus Nothofagus and its taxonomic significance Pollen fertility and cytological observation of a thermosensitive genic male sterile line of non-pollen type XianS in rice(Oryza sativa L.) Pollen Morphology of the Platycodonoid Group (Campanulaceae s. str.) and Its Systematic Implications lntrageneric Variation of Pollen Types in the Genus Phyllanthus L. Preliminary Identification of a Novel Sanming Dominant Male Sterile Gene in Rice (Oryza sativa L.) Pollen assemblages of major steppe communities in China