NrDNA ITS sequences analysis and genetic rela tionship identification of Magnolia officinalis from different geographical regions Identification of Trapa L. plants along middle-low reaches of Changjiang River by analyzing their DNA sequences Isolation and identification for strains from wild Phellinus and analysis on its secondary metabolites Phylogeny of Catalpa (Bignoniaceae) inferred from sequences of chloroplast ndhF and nuclear ribosomal DNA First report of black spot disease on fruit of Jun jujube caused by Fusarium verticillioides in Xinjiang rDNA ITS Sequence Analysis of Different Cultivar Variety of Cornus officinalis