湖北菱科植物的数量分类研究——Ⅲ.分类性状的定量评价

NUMRICAL TAXONOMIC STUDIES IN TRAPA IN HUBEI Ⅲ. Numerical evaluations of taxonomic characters

用R聚类分析和主分量分析,定量研究了湖北菱科5种8变种37个形态和生态性状的变异及分类学价值。结果表明,植物体大小变异是形态演化的主要方向之一。形态演化的同时,也发生生态分化。除少数性状例外,形态演化与生态分化在相当程度上是独立的。

In this paper a classification of Trapaceae whose specimens were collecte from Hubei province is presented based upon the comparative researches on the results of the cluster analysis, the observations on the potlen morphology under light microscope and the quelitative analysis of habitat. Both morphological discontinuity and ecological isolation were used as the criteria of recognizing species in Trapa. Finally, 17 OTU's were divided into 5 species and 8 varieties of which 4 were new ones and others were new combinations. The species and varieties are listed below; Trapa incisa Sieb. et Zucc.: T. maximowicii Korsh.; T. bicornis Osb.; T.bicornis Osb. var. quadrispinosa (Roxb.)Z.T. Xiong; T.bicornis Osb. var. bispinosa (Roxb.) Z. T. Xiong; T. bicornis Osb. var. taiwanensis (Nakai) Z. T. Xiong; T. bicornis Osb. var. acornis (Nakano) Z.T.Xiong; T.japonica Fler; T.japonica Fler. var. magicorona Z.T.Xiong; T. japonica Fler. var. longicollum Z.T.Xiong; T.pseudoincisa Nakai; T.pseudoincisa Nakai var. aspinifa Z.T.Xiong; T.pseudoincisa Nakai var. complana Z.T.Xiong.