四川省盐边县种子植物区系分析

通过野外调查、标本采集以及查阅文献资料，对盐边县种子植物区系进行统计分析。结果表明：盐边县野生种子植物有111科、453属、778种，其中裸子植物5科、6属、8种，被子植物106科、447属、770种。科有10个分布类型，8个变型，热带成分与温带成分比值为1.84∶1，具有明显的热带性质。属有15个分布类型，20个变型，热带成分与温带成分比值为0.96∶1，2种成分比例相当。盐边县有33种珍稀濒危保护种子植物，包括1种濒危植物、1种国家一级保护植物和31种国家二级保护植物。盐边县的种子植物丰富，分布类型跨度大，应当加强保护。

Analysis of Seed Plant Flora in Yanbian County,Sichuan Province

Through field investigation, sample collection and literature review, the floristic characteristics of seed plants in Yanbian County was statistically analyzed. The result showed that there were 111 families, 453 genera and 778 species of wild seed plants in Yanbian County. Among them, gymnosperms had 5 families, 6 genera and 8 species, and angiosperms had 106 families, 447 genera, 770 species. The distribution types of the family were 10 distribution types and 8 variants, and the ratio of tropical components to temperate components was 1.84∶1, showing obvious tropical properties. The distribution type of genus was 15 distribution types and 20 variants, and the ratio of tropical components to temperate components was 0.96∶1, indicating similar proportions of 2 components. There were 33 species of rare and endangered seed plants in Yanbian County, including 1 endangered plant, 1 national first-class protective plant and 31 national second-class protective plants. The protection of plant resources in Yanbian County should be strengthened because it has rich resource of seed plants with wide distribution types.