Common native perennial mainly occurs in coastal lowlands of the dry zone, usually on sandy foreshores and saline flats in association of grasslands. Also known to extend to the wet zone up to 500 m elevations along roadsides, as a weed of tea estates and disturbed grounds.
Panicle - Usually 5-11 cm long &1-2 cm wide Spikelets - 2-3 mm long &1-1.5 mm wide
An introduced perennial native to tropical America. Naturalized and occurs in wide range of habitats as a ruderal and weed from sea level to about 1900 m a.s.l., mainly in the wet zone. It is used as a lawn grass.
Common native grass species of most parts of the wet and dry lowlands up to about 1200 m a.s.l. of mid-hills It occurs mainly in damp or shady sites in disturbed places, but also in varies other habitats including dry patana lands.
An introduced and naturalized perennial often forming large clumps. Probably native to the Africa. It occurs commonly in open grassy areas, river banks, neglected lawns, roadsides, pastures and plantations from sea level to about 1000 m elevations.
Native plant of tropical Africa. Introduced to Sri Lanka as an ornamental grass. Escaped and naturalized along roadsides, cultivated lands, fallow fields, etc. from sea level to about 1100 m a.s.l. It has become an invasive weed of forests and plantations.
Common indigenous annual or short-lived perennial widely distributed in both wet and dry zones up to about 1400 m elevations. Often a weed of cultivation. Also occurring in tea estates, lawns, gardens, waste areas, roadsides as well as lowland jungles.
An introduced ornamental vine native to the America. Escaped and naturalized along roadsides, disturbed areas and scrublands, mostly in the wet zone. But also found near coast in the northern dry zone.
Common native annual or short-lived perennial grass species grows in marshy habitats, rice fields, stream banks and ditches from sea level to 1800 m a.s.l. Troublesome weed of paddy fields though use as a fodder for cattle.
An indigenous perennial occurs mainly near sea level on beaches, sandy shores and coconut plantations. An endemic variety srilankense is known only from two collections made in a single population from Pallugaturai of Puttalam district.
Common native tufted annual widely distributed often in or near water as weed of paddy fields and disturbed grounds from sea level to 1300 m a.s.l. in all three climatic zones. The grass including seed is readily eaten by cattle. The grain is used as food in India by poorer classes and in Myanmar in times of scarcity.
An indigenous aquatic herb with submerged and floating leaves occurs in lakes, ponds and tanks from sea level to about 1300 m a.s.l, mainly in the northern and western part of the country down to Panadura. Flowering throughout the year.