江西吉安退化湿地松群落植物区系特征分析

Flora Characteristics of the Degenerated Pinus elliottii Communities in Ji'an,Jiangxi Province

对江西吉安退化湿地松群落植物区系特征分析,结果表明:样地中有维管束植物共计98种,隶属47科88属;热带性质的科占总科数的75%,热带分布属占总属数的53.52%。其中,以泛热带分布的科、属最多,分别占科、属总数的67.86%,28.17%;温带性质的科占25%,温带分布属占45.07%;科、属、种的配比特征为:较多的科、属含较少的种,较少的科、属含较多的种。

The flora characteristic of the degenerated Pinus elliottii communities in Ji＇an of Jiangxi Province were analyzed in this paper.The result showed that there were 98 species of vascular plant in 47 families and 88 genera in the area.The families and genera of tropical distribution take up 75% and 53.52% in the total,respectively.The families and genera of pantropic distribution take up 67.86% and 28.17%.At the same time,the families,genera with temperate-zone characteristics take up 25% and 45.07%.The proportion characteristics of families,genera and species were＂more families and genera include less species,less families include more species＂.