湖南省国家级珍稀濒危植物分布特征及区系探讨

湖南省自然分布的国家级珍稀濒危保护植物共有56种,分属于31科49属,其中国家一级保护植物3种、国家二级保护植物22种、国家三级保护植物31种,主要集中分布在湘西南、湘西北、湘南地区;其区系的热带性属与温带性均各占总属数的44.90%、55.10%.这种亚热带地区(热带一温带过渡)的植物区系具有古老残存种类丰富、东亚(中国)特有、单型属多以及由于分异而产生的区系地理成分混杂、汇集与过渡的特点.

Approach to the Distributional Characteristics of National Rare and Endangered Plants and Their Flora of Hunan

There are 56 native species of the national-class rare and endangered plants in Hunan belonging to 31 families and 49 genera, among which 3 are first-class and 22 are second-class and 31 are third-class protected plants of China, having their main distribution in the south-west and north-west and south of Hunan. Tropical and temperate genera of their flora have 44.90% and 55.10% respectively, thus, their florae of the subtropical area of Hunan possess the characteristics with a great number of ancient and survival species and many genera of eastern Asia and endemic in China and lots of monogenera, as well as resulting mixture and concentration and transition of the various geological ingredient from variation.