A Study on Cold Tolerance Difference and Its Mechanisms in Azalea Cultivars Comparison of Cold Tolerance Within 6 Cultivars of Iris germanica A Study on Cold Tolerance Difference and Its Mechanisms in Azalea Cultivars The LT50 and Cold Tolerance Adaptability of Chrysanthemum During a Natural Drop in Temperature The LT50 and Cold Tolerance Adaptability of Chrysanthemum During a Natural Drop in Temperature Cold resistance of Pistacia chinensis and Koelreuteria integrifoliola. Physiological Characteristics of Cold Resistance in Hybrid Evergreen Euonymus and Their Parents Studies on Evaluation and Screening of Cold Resistance During Seedling Stage in Eighteen Species or Varieties of Spiraea Determination and Comprehensive Evaluation on Cold-tolerance of Wild Citrus from Guizhou Evaluation of Frost Resistance Ability of Different Walnut Cultivars Comparison of Cold Tolerance Within 6 Cultivars of Iris germanica Evaluation on Cold Resistance of Four Juglans Species in Leaf-expansion Period Studies on Evaluation and Screening of Cold Resistance During Seedling Stage in Eighteen Species or Varieties of Spiraea Cold Resistance of Zenia insignis from Different Provenances Evaluation on Cold Resistance of Four Juglans Species in Leaf-expansion Period