Investigation on the resources of rare and endangered plants in Kuanba forest region
中国主要河流鱼类分布及其种类多样性与流域特征的关系

Based on the floristic analysis of the rare and endangered plants,the paper reveals that the floristic composition in Kuanba forest region has the three major characteristic features:richness in species diversity,ancient origin and floristic complexity.The endangered causes are also discussed.The effective protected countermeasure for these species is approached.