河南木兰属玉兰亚属植物数量分类的研究

本文采用系统聚类分析方法对河南木兰属玉兰亚属１４种植物进行研究。研究结果表明，聚类的分类特征性状不同，其结果差异显著。如①采用叶部分类特征性状聚类，则１４种植物明显聚为两大类：木兰类和玉兰类。该亚属玉兰组和望春玉兰组植物的聚类结果与其原分类系统相吻合，而木兰组和望春玉兰组应合并为一组，即木兰组。同时，调整了某些种的归属。②采用花部分类特征性状和③综合３８个分类特征特状的聚类结果相一致，不能作为玉兰亚属分组的依据和标准，即难以将１４种植物分成几个大的类别。但是，可以作为玉兰亚属种群鉴定、检验与划分的依据和手段。

Study on the Quantitive Classfication of Subgenus Yulania of Magnolia in Henan

Study on 14 plants of Subgenus Yulania of Magnolia in Henan was carried out by using the method of system cluster analysis. The results showed with different classification characteritics,the result was obviously different.For example,14 plants can be divided into two kinds (Tulipastrum and Yulania)according to leave characteristics.The cluster results of group Yulania and group Buergeria is identical to their oringinal classification system. The group Tulipastrum and the group Bnergeria ought to be combined into one section,namely group Tulipastrum. The cluster results showed no difference by using the characteristics of flowers and 38 comprehensive characteristics. They can not be the basis and standard to the classification of Subgenus Yulania, which mwans it is difficult to classify 14 species plants into several great groups.But they can be basis and method to the identification,exmination and classification of Subgenus Yulania.