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.