中国薹草属黑穗薹草组的数量分类研究

对中国薹草属黑穗薹草组Sect.Racemosae及外类群冻原薹草组Sect.Frigidae共20种3变种采用38个形态特征进行了数量分类研究。聚类分析结果表明,黑穗薹草组应是一个自然分类群;支持了《中国植物志》将两对相似种：乌拉草（Carer meyeriana）与红原薹草（Carer hongyuanensis）、膨囊薹草（Carex lehmanii）与五台山薹草（Carex montis-wutaii）分别处理为种的观点。主成分分析结果表明,本组的分类特征较为稳定与集中,本组主成分分析散点图与聚类分析的分类结果大致吻合,并表明有关小坚果、果囊、鳞片、主茎叶和苞片的性状在本组的分类中起到了主要作用。

A Numerical Taxonomic Study of the Carex Section Racemosae (Cyperaceae) in China

Based on 38 morphological characteristics,a numerical analysis on 20 species and 3 varieties of Sections Racemosae and Frigidae of the genus Carex in China is presented on this paper.Cluster analysis results revealed that Section Racemosae is a natural group,which supports the opinion in Flora Reipublicae Popularis Sinicae that Carex meyerinan,Carex hongyuanensis,Carex lehmanii,and Carex montis-wutaii are distinct species.The principal component analysis suggested that the characteristics used for the taxonomy of Section Racemosae are stable and concentrative.Both cluster analysis and principal component analysis offer the same classification result for Section Racemosae.The principal component analysis indicated that characteristics such as nutlet,utricle,maximum leaf on fruiting culm,pistillate glumes,and bract are more significant for the taxonomy of this section.