以9个产地51个秀丽四照花〔Cornus hongkongensis subsp. elegans （W. P. Fang et Y. T. Hsieh） Q. Y. Xiang〕家系的3年生子代试验林为研究对象，对其叶色参数和叶形性状进行变异分析，并对叶色参数和叶形性状间及其与产地地理-气候因子的相关性进行分析。结果表明：叶色参数中，L*、a*、b*、C*和h°值的变幅分别为26.41~31.25、6.76~12.21、5.09~9.11、8.99~14.90和0.53~0.77，变异系数分别为5.52%、20.07%、19.26%、11.77%和7.94%；彩叶期变幅为121~146 d，变异系数为5.43%。叶长、叶宽、叶长宽比、叶周长和叶面积的变幅分别为6.57~10.19 cm、2.89~4.70 cm、1.64~2.53、16.94~26.32 cm和14.06~32.08 cm²，变异系数分别为13.74%、14.96%、13.43%、13.16%和24.79%。方差分析结果表明：C*值在产地间的差异以及L*、a*和C*值在产地内的差异均显著（P<0.05），彩叶期在产地间的差异以及叶长、叶宽、叶长宽比、叶周长和叶面积在产地间和产地内的差异均极显著（P<0.01）。除彩叶期外，其余叶色参数和叶形性状在产地内的方差分量百分率大于产地间；供试叶色参数和叶形性状在产地内的方差分量百分率均值为20.09%，明显大于产地间（13.99%）。相关性分析结果表明：L*、a*、b*和C*值间极显著正相关；h°值与a*值极显著负相关，与b*值显著正相关。叶长与叶宽、叶周长和叶面积极显著正相关；叶宽与叶周长和叶面积极显著正相关，与叶长宽比极显著负相关；叶面积与叶长宽比显著负相关，与叶周长极显著正相关。多数叶色参数和叶形性状与海拔显著或极显著相关，部分叶色参数和叶形性状与纬度和年均温显著或极显著相关。综上所述，秀丽四照花叶色参数和叶形性状变异较大，且变异主要来自产地内的家系间，其叶色参数和叶形性状受产地地理-气候因子影响。

 Taking 3-year-old progeny test forests of 51 families of Cornus hongkongensis subsp. elegans（W. P. Fang et Y. T. Hsieh） Q. Y. Xiang from 9 localities as research objects， the variation of their leaf color parameters and leaf shape traits was analyzed， and the correlations among leaf color parameters and leaf shape traits and correlations of them with geographical-climatic factors of locality were analyzed. The results show that among leaf color parameters, the variation ranges of L*， a*， b*， C* and h° values are 26.41-31.25， 6.76-12.21， 5.09-9.11， 8.99-14.90 and 0.53-0.77， respectively， and their variation coefficients are 5.52%， 20.07%， 19.26%， 11.77% and 7.94%， respectively； the variation range of colored leaf stage is 121-146 d， and its variation coefficient is 5.43%. The variation ranges of leaf length， leaf width， ratio of leaf length to leaf width， leaf perimeter and leaf area are 6.57-10.19 cm， 2.89-4.70 cm， 1.64-2.53， 16.94-26.32 cm and 14.06-32.08 cm2， respectively， and their variation coefficients are 13.74%， 14.96%， 13.43%， 13.16% and 24.79%， respectively. The result of analysis of variance shows that the difference in C* value among localities and differences in L*， a* and C* values within locality are significant （P<0.05）， and the difference in colored leaf stage among localities and differences in leaf length， leaf width， ratio of leaf length to leaf width， leaf perimeter and leaf area among localities and within locality are extremely significant （P<0.01）. Except for colored leaf stage， the percentage of variance component of other leaf color parameters and leaf shape traits within locality is higher than that among localities； the mean percentage of variance component of test leaf color parameters and leaf shape traits within locality is 20.09%， which is obviously higher than that among localities （13.99%）. The correlation analysis result shows that there are extremely significantly positive correlations among L*， a*， b*and C*values； there is an extremely significantly negative correlation of h° value with a* value， and a significantly positive correlation with b* value. There are extremely significantly positive correlations of leaf length with leaf width， leaf perimeter and leaf area； there are extremely significantly positive correlations of leaf width with leaf perimeter and leaf area， and an extremely significantly negative correlation with ratio of leaf length to leaf width； there is a significantly negative correlation of leaf area with ratio of leaf length to leaf width， and a extremely significantly positive correlation with leaf perimeter. There are significant or extremely significant correlations of most leaf color parameters and leaf shape traits with altitude， and there are significant or extremely significant correlations of some leaf color parameters and leaf shape traits with latitude and annual mean temperature. In conclusion， the variations of leaf color parameters and leaf shape traits of C. hongkongensis subsp. elegans are large， and the variations mainly come from the families within locality， its leaf color parameters and leaf shape traits are affected by geographical-climatic factors of locality.