铜仁市万山特区木本植物区系研究

经野外调查统计，铜仁市万山特区共有木本植物82科216属495种（包括种下等级，下同）。其中，裸子植物5科6属7种；被子植物77科210属488种，包括单子叶植物3科7属17种，双子叶植物74科203属471种。区系分析结果表明：（1）区系地理成分复杂多样，温带性质明显，同时与热带区系联系紧密；（2）区系性质具有原始性，有古老和孑遗类群；（3）特有现象明显，表现为中国特有种数量较多；（4）与邻近6个地区的木本植物区系比较可知，万山特区与重庆大木山关系密切，与泸沽湖较疏远。

Study on the Woody Plants Flora of Wanshan,Tongren City

Based on field surveys, we recorded 82 families, 216 genera, and 495 species (including subspecies) of woody plants in Wanshan, which included 5 families, 6 genera, and 7 species of gymnosperms; 77 families, 210 genera, and 488 species of angiosperms, including 3 families, 7 genera, and 17 species of monocotyledons, and 74 families, 203 genera, and 471 species of dicotyledons. Floristic analysis showed that:(1) The geog-raphical composition of the flora was complex and diverse, with obvious temperate characteristics, and closely linked with tropical flora; (2) The floristic features of the Wanshan flora were relatively primitive, with many ancient and relic taxa; (3) Many species were endemic to China; (4) Compared with the woody flora of six adjacent areas, the Wanshan flora was closely related to that of Damu Mountain in Chongqing, but distant to that of Lugu lake.