| Using the method of the fourth survey of the national Chinese medical resources, the wild Chinese medical plant resources Changjiang county of Hainan were investigated. The distribution patterns and species richness of the wild Chinese medical plants were explored according to their altitudinal distributions and occurrence frequencies. Results showed that the Chinese medicinal plants in Changjiang country were attributed to 179 species, including 42 species of national key Chinese medical plants, 20 species of Hainan key Chinese medicinal plants and 117 species of Chinese folk herbal plants in the Li minoritie. This indicated that both the medical plant resources and folk herbal knowledges in this country were rich. The medical plants in this country could be classified into widely distribution species (9 species, 5%),generally distribution species (48 species, 28.6%) and narrowly distribution species (122 species, 68.2%), according to their distributions along the altitude. Occurrence frequencies of 125 plant species were positively correlated with their distribution ranges, indicating that the higher the plant occurrence frequency, the wider their distribution ranges. The result also indicates that it is needed to enhance the protection of rare and endangered wild medicinal resources when we develop and utilize the wild medical plants. |
