斑叶堇菜种宗性状变异式样的定量分析

斑叶堇菜与近缘种细距堇莱之间有许多过渡类型存在, 很难依据少数几个关键性特征对它们进行明确的划分。本文运用形象化散点图和柱状图的方法, 对从不同地点、不同居群收集的80份标本进行分析, 测量若干性状上的数量变异, 分析这些性状之间变异的相关程度, 结果表明:斑叶堇菜和细距堇菜各自应为独立的种, 支持W.Beck.1916年所作的成立细距堇菜的毛萼亚种的处理。

A QUANTITATIVE ANALYSIS OF THE VARIATION PATTERN OF CHARACTERS OF THE VIOLA VARIEGATA COMPLEX

Taxa of V. variegata and its allied species are taxonomically perplexing.By means of conventional taxonomic methods, it is difficult to discriminate them from one another. A quantitative analysis of the correlations between certain key characters was thus made by applying the methods of pictorra-lized scatter diagram and histogram. Results from both methods have indicated that this complex can be divided into 3 parts:V. Te and Tr respec-tively. According to the pictorialized scatter diagram and histogram, V(V.varieeata Fisch.) can easily seperated from Te and Tr. It is thereforeadvisable to reserve the specific rank of this taxa. Te and Tr are somewhatover lapped and are by no means strictly separable. Thus we favor thetreatment made by W. Beck. in 1916 to treat Te as a distinct species, namely V. tenuicornis W. Beck. and Tr as a subspecies of V. tenuicornis, asV. tenuicornis ssp. trichosepala W. Beck.