Chromosome Numbers and Karyotypes of Three Zelkova Species Fingerprinting construction for superior individuals of Zelkova schneideriana based on CE-SRAP A New Variety of Zelkova schneideriana ‘HenTianGao’ Physiological and Biochemical Changes in Zelkova serrata Leaves during Leaf color Transformation in Autumn Effects of elk grazing on soil physical and chemical properties of grassland on Tiane Island Computer Color Matching of Birch Veneer for Artificial Dyeing A preliminary study of molecular phylogeny and biogeography distribution pattern of Zelkova inferred from trnL-trnF and nrITS sequences Study on DNA extraction of Zelkova EXAMINATION ON THE TYPE OF ZELKOVA SPACH(ULMACEAE)