It was indicated that:1) due to the high-level distribution of homoplastic characters in Acer,it is difficult to use cladistic method to resolve the phylogenetic relationships of the sections as currently defined;

• 通过对具体的性状状态分布分析显示 ,对于象槭属这样在形态上分化较大的类群 ,由于多数分类性状在不同类群间经历了平行和逆转演化 ,因而在较低分类阶元水平很难选择合适的性状来通过分支分析构建其系统发育 ;