Over 200 of these introduced species have spread from parks and gardens into wild places and mountains, whether by deliberate planting or by natural seed dispersal. More than 90 commonly seen exotic species are already displacing native plants.
其中兩百多種靠著人類移栽與種子自然散播，已從庭院、公園綠地入侵野地、山區，有九十幾種常見外來植物已干擾本土植物的生存。