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.