湖北汤孙湖菱属植物果实性状的变异式样及其分类学意义

Variation Pattern of Trapa.L.from Tangsun Lake of Hubei Province and It’s Taxonomic Signification

本文用居群方法采集湖北汤孙湖菱属（Trapa.L.）植物果实140个，分别测量了18个性状，以柱形图、形象化散点图分析了性状的可塑性，变异式样及其相关性。并探讨了其分类学意义，结果表明，腰角的有无和长度可作为分类的主要性状，依此，可将汤孙湖的菱属确认为格菱和野菱两个种。

This paper expounds the collected by the method of population 140 fruits of Trapa in Tangsum Lake.Hubei province,and the measurement of its 18 characters analyses its plastcity.Variation pattern and correlatisn on the basis of histogram and pictorialized scatter diagram and discusses their taxonomic Signification.The results demonstrate that the existence or non existence of transversal horns and its length may be regarded as the chhef character in classificatio and consequenthy the Trapa in Tangsun Lake may be confirmed as two different species.i.e.,T.pseudoincisa Nakai and T.incisa Sieb.et Zucc.