【摘要】 【目的】厘清大青山国家级自然保护区珍稀濒危保护种子植物组成及区系特征，为该自然保护区种子植物资源的有效保护与合理开发利用提供参考。【方法】基于野外调查数据及文献资料，形成大青山国家级自然保护区珍稀濒危保护种子植物名录，并通过区系研究方法对其区系地理成分进行分析。【结果】大青山国家级自然保护区共有珍稀濒危保护种子植物53种，隶属24科38属，其中，国家二级重点保护野生植物12种、内蒙古珍稀濒危保护植物22种、内蒙古珍稀林木29种。种子植物的生活型以木本植物为主，共29种，占大青山国家级自然保护区珍稀濒危保护种子植物总种数的54.7%；草本植物23种，占总种数的43.4%。水分生态型以中生植物为主，共43种，占总种数的81.1%。植物区系以华北分布种和东亚分布种为主。【结论】大青山国家级自然保护区区系地理成分较为丰富，具有明显的温带性质，反映了大青山植物区系的特征。更多还原

【Abstract】 【Objective】To clarify the species composition and flora characteristics of rare and endangered protected seed plants in the Daqingshan National Nature Reserve,and provide references for the effective protection and rational development and utilization of seed plant resources in the reserve. 【Methods】Based on field survey data and literature,a list of rare and endangered protected seed plants in the Daqingshan National Nature Reserve was formed. And the floristic research method was used to study the flora geographical components. 【Results】There were 53 species of rare and endangered protected seed plants in the Daqingshan National Nature Reserve,belonging to 24 families and 38 genera. Among them,there were 12 species of national secondary key protected wild plants,22 species of Inner Mongolia rare and endangered protected plants,and 29 species of Inner Mongolia rare forest trees. The life form of seed plants was mainly woody plants,with a total of 29 species,accounting for 54.7% of the total number of rare and endangered protected seed plants in the Daqingshan National Nature Reserve;23 species of herbaceous plants,accounting for 43.4% of the total. The water ecotype was dominated by mesophyte,with 43 species,accounting for 81.1% of the total. The flora was dominated by North China and East Asian distribution species. 【Conclusion】The flora of the Daqingshan National Nature Reserve was rich in geographical elements and had obvious temperate properties,reflecting the flora characteristics of Daqingshan.更多还原