Chemical constituents in root bark of Changium smyrnioides PHARMACOGNOSTICAL STUDY AND DETERMINATION OF COMMON METAL ELEMENTS ON THE ROOTS OF TONGOLOA SILAIFOLIA(DE BOISS)WOLFF Genetic differentiation of Wolffia globosa in China Separation and Identification of Thellungianin H from Thellung Pimpinella (Pimpinella thellungiana) Root HPLC Fingerprint of Bupleurum smithii var.Parvifolia Isolation and Identification of Thellungianin C and D from the Root of Thellung Pimpinella (Pimpinella thellungiana) Effects of five allelochemicals on enzyme activity in Panax ginseng roots Studies on Chemical Components of Peucedanum wawrii(Wolff) A STUDY OF THE CHINESE DRUGS OF UMBELLIFERAE V. CHEMICAL CONSTITUENTS OF THE ROOTS OF HERACLEUM HENRYI WOLFF