In the wild, C. roseus is an endangered plant; the main cause of decline is habitat destruction by slash and burn agriculture.[16] It is also, however, widely cultivated and is naturalized in subtropical and tropical areas of the world such as Australia, Bangladesh, India, Malaysia, Pakistan, and the United States.[2] It is so well adapted to growth in Australia that it is listed as a noxious weed in Western Australia and the Australian Capital Territory,[17] and also in parts of eastern Queensland.[18]