Biotransformation of polyphyllins by Curvularia lunata fermentation Separation of polyphyllin from Rhizoma Paridis by foam fractionation technique HPLC fingerprint of Paris polyphylla var. yunnanensis HPLC fingerprint of Paris polyphylla var. yunnanensis Determination of seven kinds of steroidal saponins in plants of Paris L. from different habitats by HPLC Determination of seven kinds of steroidal saponins in plants of ParisL. from different habitats by HPLC Study on hemolytic mechanism of polyphyllin Ⅱ