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Thirty three plus trees of Castanopsis fissa were collected to study leaf phenotypic deversity from 3 provinces in southeast China. Five indicators were chosen to describe foliage traits, including leaf area, leaf limb circumference, leaf length, leaf width, and leaf length/width ratio. The results showed that there were significant differences in 5 phenotypic traits among 33 plus trees, suggesting abundant diversity in leaf morphology of C. fissa. The mean variation coefficient of phenotypic traits was all above 10% and the order was: leaf area > limb circumference > leaf width > leaf length > length/width ratio. Cluster analysis divided 33 plus trees into 5 groups. Group I was a popular type, consisting of 29 plus trees. Guangxigaotian 2, Guangdongshaoguan 1, Guangxixiaojing 2 and Guangxizhenlong 1 plus tree were independently classified into groups II, III, IV and V, and characterized by large leaf, narrow leaf, wide leaf, and large leaf with hightapering, respectively.
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