<正>对南京幕府山地区进行植物调查和标本采集的基础上，进行该地区植物区系基本组成分析。幕府山植物区系特点为：植物区系具有强烈的过渡性，具有明显的北亚热带性质。把幕府山与相似纬度的安徽琅琊山、清凉峰自然保护区进行比较分析，结果表明，3个地区植物区系的地理成分总体上相似，主要是温带和热带成分。

Electric eonductivities of excised-leaves of 7 species of Ilex trees distributed in China were measured and lethal temperature 50 (LT50) were calculated under the simulated freezing treatment. The results indicated that the low temperature tolerance ability of 7 species of Ilex trees had a significant difference, and the freezing resistance from strong to weak was Ilex latifolia, I. comuta, I. chinensis, I. rotunda, I. zhejiangensis, I. hylonoma, I. integra. Four trees selected from 7 species of Ilex trees that treated by 4℃ and -16℃ were chosen to measure the contents of unsaturated fatty acids. The results revealed the content of unsaturated fatty acids and IUFA increased as the temperature decreased, and the increasing extent of IUFA was were different respectively so they could be used as supplementary validation of the low temperature tolerance ability of different Ilex trees. The research resuits also provide important indexes for introducing Ilex trees to higher latitude region.