PRELIMINARY STUDY OF THE GERMINATION AND THE SEED OF DIURANTHERA MAJOR PRELIMINARY STUDY OF THE GERMINATION AND THE SEED OF DIURANTHERA MAJOR CHEMOTAXONOMY OF DIURANTHERA, AN ENDEMIC GENUS IN CHINA STEROIDAL SAPONINS FROM FOUR SPECIES OF LIUIFLORAE PLANTS THE PHYLOGENETIC PLACE AND ORIGINATION OF THE GENUS DIURANTHERA KARYOTYPE STUDY ON CHLOROPHYTUM MALA YENSE AND DIURANTHERA MAJOR