15 samples from the inner and medium tepals of Chimonanthus praecox were selected for their representative phenotype in color to study the flower pigments.With the analysis of several color reactions and UV-visible spectra (200~600 nm),results were as follows:the main flower color pigments are attributed to flavonoids,including aurones,chalcones,flavonols and flavanones.Furthermore,anthocyanins and their anthocyanidins were contained in the red inner tepals or the ones with red speckles.In addition,the Q cluster analysis with average method based on the color reactions separated the 15 samples into 5 groups,consistent with the phenotypic color.