|Floristic region(s)||Hawaiian Islands
, East Pacific Islands
, Sub-tropical Pacific
, Other outside Australasia
, Papua New Guinea (lowland)
, Australia (east coast)
|Vegetation communities||disturbed/anthropogenic, scrub and/or heathland
|Habitat notes||It is native to tropical areas in the Americas but it can be found in warm regions around the world where it is an introduced species. This is a rhizomatous perennial herb growing one to several erect stems to heights up to about half a meter, often much shorter. It produces tiny inflorescences of a few spikelets each which in total are less than a centimeter long. It is sometimes a weed in wet areas such as cultivated land and irrigation ditches. On Rapa Nui (Easter Island)tends to dominate treeless uplands of the island today.