重庆市永川区木本园林植物区系特征分析

Analysis on floral characteristics of the woody landscape plants in Yongchuan of Chongqing

通过野外实地调查,对永川建成区范围的木本园林植物资源进行区系分析,结果表明,研究区共有木本园林植物69科154属240种(含变种)。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。热带性质的科有31科,温带性质的科有24科,中国特有分布2科,分别占总科数的44.9%、38.4%和2.9%。热带分布属72属,以泛热带分布属最多;温带分布属70属,北温带分布属居首位;中国特有分布7属。属的热带分布与温带分布类型所占比例相差不大。

Based on the field survey and literature review,the floral analysis on woody landscape plant resources in Yongchuan district,Chongqing City was conducted.The results indicated that there 240 species(including varieties)belonging to 154 genera in 69 families in Yongchuan.The analysis on proportion characteristics of families,genera and species showed that more families and genera included less species whereas less family included more species.31 tropical families accounted for 44.9%of the total families,24 temperate for 38.4%,and 2 families uniquely distributed in China,accounting for 2.9%.At the level of genus,there were 72 tropical genera which were mainly pan-tropical distributed gencra,70 temperate genera in which the North Temperate genera were the most,and there were 7 endemic genera in China.