【摘要】 文章采用野外调查和资料统计相结合的方法，查清大兴安岭山脉现有国家重点保护野生植物种类、分布和群落组成，计算其濒临消失风险指数，评价植物受威胁濒危程度，为大兴安岭国家重点保护野生植物的保护与管理提供依据。结果表明：大兴安岭山脉现有国家重点保护野生植物24种，隶属4个门，16个科和19个属，以被子植物为主。从植物的科分布来看，以兰科（Orchidaceae）、禾本科（Gramineae）、豆科（Leguminosae）和景天科（Crassulaceae）为主，所含种数占50.0%。红景天（Rhodiola rosea）和黄檗（Phellodendron amurense）濒临消失风险指数相对较高，分别为0.92和0.76，受威胁濒危程度较高；野大豆（Glycine soja）和浮叶慈姑（Sagittaria natans）濒临消失风险指数相对较低，分别为0.38和0.30，受威胁濒危程度较低。更多还原

【Abstract】 This article combines field surveys and data statistics to investigate the existing types,distribution, and community composition of national key protected wild plants in the Greater Khingan Mountains, calculate their risk of extinction index, and evaluate the degree of threat to the plants. The results provide a basis for the protection and management of national key protected wild plants in the Greater Khingan Mountains. The findings indicate that there are 24 national key protected wild plant species in the Greater Khingan Mountains, belonging to 4 divisions,16 families, and 19 genera, with angiosperms being the majority. In terms of family distribution, the predominant ones are Orchidaceae, Gramineae, Leguminosae, and Crassulaceae, accounting for50.0 % of the species. Rhodiola rosea and Phellodendron amurense have relatively high risk of extinction indices of 0.92 and 0.76, respectively, indicating a higher degree of threat and vulnerability; Glycine soja and Sagittaria natans have relatively lower risk of extinction indices of0.38 and 0.30, respectively, indicating a lower degree of threat and vulnerability.更多还原