Study on the Exotic Invasive Plants in Shanxi Province

41 species of exotic invasive plants belonging 19 families and 35 genera were identified in Shanxi Province through investigations and referring to the related references.There were one species of hydrophyte and 40 species of terricolous among them.In which,26 species,accounting for 63% of the total number from America were the most.18 genus in semitropical area,mostly fitting cool climate,were the most.32 species were fetched in intentionally as vegetable,flower and plant of drug.9 species were fetched in accidentally by manpower or natural pervasion.10 species were harmful and widespread.There were three aspects of harmness: destroying structure and function of ecosystem,making species diversity decrease,and being harmful to agriculture and forestry production severity.Some corresponding preventable strategies were provided.