Chamaecrista rotundifolia

Widely naturalised in the coastal and sub-coastal regions of northern and eastern Australia. Its current range extends from the coastal districts of northern New South Wales, through south-eastern, central and northern Queensland, the coastal districts of the Northern Territory to a few locations in northern Western Australia. Also naturalised on Norfolk Island and on Lord Howe Island. Naturalised overseas in western Africa and south-eastern USA (i.e. Florida).