Study on Flora of Invasive Alien Seeds in Yanbian Prefecture,Jilin Province
In this study,the invasive seed plants from 233 sample sites in 8 cities(counties)including Yanji and Tumen were investigated by route survey and sample site survey.The floristic characteris-tics of the seed plants were analyzed by the method of floristic geography.The results showed that there were 45 species,35 genera,16 families of invasive seed plants in Yanbian,Jilin Province,main-ly composed of Asteraceae and Fabaceae,and mainly annual and biennial herbs.The plants originating from America accounted for 55.56％.By analyzing the similarity coefficient of seed plant genera in dif-ferent regions of Yanbian Prefecture,the largest similarity coefficient was Yanji-Heron(95.65％),and the smallest similarity coefficient was Antu-Longjing(80.65％).
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