Native annual herb of tropical America. Introduced probably around 1884 since it was not recorded from Sri Lanka before 1884(Flora of Ceylon Vol 6). Now widely distributed in disturbed places, home gardens, on wet rocks, vertical banks and also as an epiphyte on roadside trees in wet lowlands up to about 500 m a.s.l. Local and rare in the dry zone. Flowering probably throughout the year. Whole plant edible and can be used in salads.