广东茂名河尾山市级自然保护区植物组成及区系特征研究

为更好地掌握河尾山市级自然保护区的森林植物种类资源、科的分布区类型等，以便最大程度地发挥其生态效益及其他社会效益。采用样线法与样方法，结合查阅资料及专家检索的方法，对该保护区内野生维管束植物组成及区系特征进行分析。结果表明1. 该保护区内共有野生维管植物179 科578属999 种，物种丰富度较高；2. 在保护区种子植物区系中，泛热带分布科数量最多，有43 科；3. 保护区仅有卷柏科（Selaginellaceae）一个优势科超过VFIW 和VFIC 平均数。研究认为区域范围内植物优势科不一定是该植物区系重要值大的科，优势科不足以反映保护区植物区系特征；且该保护区植物物种热带性较强，这与保护区地处南亚热带气候区相吻合。

Study on Plant Composition and Floristic Characteristics of the Heweishan Nature Reserve, Guangdong

In order to get a better grasp of the forest plant species resources and the distribution types of families, and give full play to its ecological benefits and other social benefits in Heweishan Nature Reserve, the composition and floristic characteristics of the wild vascular plants in the reserve were analyzed by using the line and sample method, combined with the method of consulting materials and expert searching. The results showed that 1. There were 999 species of wild vascular plants of 179 families, 578 genera, the reserve is rich in species. 2. Among the seed plant floras in the reserve, the number of pan-tropical distribution families was the largest, with 43 families. 3. Only one dominant family of Selaginellaceae exceeds the average of VFIW and VFIC in the reserve. Studies have shown that the dominant family in the reserve is not necessarily the family that had a large floristic value, and the dominant family is not enough to reflect the floristic characteristics of the protected area. In addition, plant species in the reserve have a strong tropical nature, which is consistent with the fact that the reserve is located in the subtropical climate zone.