用２４个形态学性状，对柑桔属（ＣｉｔｒｕｓＬ．）植物的２４个分类群进行了相容性分支分析，得到了建立在１４个相容性状基础上的分支图。分支关系表明，施文格分类系统的真正柑桔亚属（Ｅｕｃｉｔｒｕｓ）是单系类群，其姐妹群是大翼橙（Ｐａｐｅｄａ）．田中系统的枸橼类（Ｃｉｔｒｏｐｈｏｒｕｍ）、柚类（Ｃｅｐｈａｌｏｃｉｔｒｕｓ）、蜜柑类（Ａｃｒｕｍｅｎ）和桔亚类（Ｍｉｃｒｏａｃｒｕｍｅｎ）是单系类群，而橙类（Ａｕｒａｎｔｉｕｍ）和真正蜜柑亚类（Ｅｕａｃｒｕｍｅｎ）是并系类群。根据分支关系，讨论了柑桔属植物系统演化关系及分类问题。 Twenty-four morphological traits were used to analyze the compatibility of 24 taxa in citrus (Citrus L.), and the branch map based on 14 compatible traits was obtained. The branching relationship shows that Eucitrus, a true Schnell classification system, is a monophyletic group whose sister group is Papeda. The mid-field system of Citrophorum, Cephalocitrus, Acrumen and Microacrumen are monophyletic, while Aurantium and Euacrumen are both Groups. According to the branch relationship, we discuss the phylogenetic relationship and classification of citrus plants.