成都地区园林种子植物属的区系分析

Analysis of the Areal-types for Genera of Garden Seed Plants in Chengdu

成都市园林植物种类丰富,珍稀濒危植物与特有植物众多,园林种子植物属的地理成分表现出从热带亚热带向温带过渡的性质,与其所处地理位置相吻合.本地种占有绝对优势,国外引进种占有较大比例,存在着一定生态安全隐患.

The areal-types of genera of the garden seed plants in Chengdu are very complicated. As far as the origin of plants is concemed, it＇s rich in rehc, rare, precious and peculiar species. The phenomena that temperate elements and tropic elements infdtrate each other show the transitions of areal-types of garden seed greening plants in Chengdu. Exotic species take a great propertion in Garden greening seed plants of Chengdu, maybe which leads to the problem of ecological security.