Invasive alien species are a major threat to biodiversity and ecosystems throughout the world. In India, a country with three of the world's most important "biodiversity hotspots", the invasion of alien plants means risking a national ecological disaster with major social and economic consequences. Currently there is insufficient information about invasive alien plants; their distribution, rate of spread and adaptability to new environments. This book reveals existing and potential invaders, evaluates the level of risk they pose to native species and suggests steps to manage spread and limit damage. Invaluable to policy-makers, this book is also required reading for researchers of invasive plants worldwide.