Analysis on population surviving process of Changium smyrnioides, an endangered plant Genetic diversity of Changium smyrnioides based on SRAP Chemical constituents in root bark of Changium smyrnioides Comparison of plasticity of seedling growth of two umbellaceae species in response to light intensity Determination of residuals of organochlorine pesticides and heavy metals in cultivated Changium smyrnioides and soil of plantation base Research on callus  induction and cell suspension culture of Changium smyrnioides Study on seed dormancy mechanisms of Changium smyrnioides and its germinating conditions Effect of seedling and fertilizering on yield and quality of cultivated Changium smyrnioides Distribution of chemical constituents in Changium smyrnioides Comparison on botanical morphology in different populations of Changium smyrnioides Change of chemical constituents in Changium smyrnioides at different ages Analysis on water-soluble components in roots of Changium smyrnioides among different populations by HPLC Comparison on pollen morphology among populations of Changium smyrnioides Comparative studies on the ecological strategies of an endangered species Changium smyrnioides and a non-endangered species Anthriscus sylvestris Influence of environmental factors on seed germination of two species in Umbellaceae Investigation on biologically characterst of wild species and herbal quality of Changium smyrnioides Comparison Between Essential Oil and Amino Acid in Fresh and Processed Roots of Changiunm smyrnioides Wollf Dynamic study on dry material accumulation and amylose content of cultivated Changium smyrnioides Study on seed quality test and quality standard of Changium smyrnioides Effects of five allelochemicals on enzyme activity in Panax ginseng roots Ecogeographical Distribution, Utilization and Protection of Rare and Precious Traditionaal Chinese Drug Changium smyrnioides Wolff Analysis of Population Genetic Structure and Molecular Identification of Changium smyrnioides and Chuanminshen violaceum With ISSR Marker