Morphological changes of phytoliths in Leymus chinensis under saline-alkali stress Pollen AnalysiS and Paleoenvironment Study of Late Pleistocene in Daganba, Guizhou Province Miocene Diatoms from the Shanwang Basin of Shandong Province and Analysis by Fuzzy Mathematics of the Paleoenvironment The Characteristics of the Pollen Spore Time Series Fluctuation and Its Significance in the Geological Environments of the Quaternary in Kunming Basin The Existence of Paleogene Sediments in East China Sea Basin by Palynological Evidence Fossil Woods from Late Cretaceous of Heilongjiang Province, Northeast China, and Their Palaeoenviromental Implications