පතොක් [Pathok]/Pricky pear (Opuntia monacantha)

An introduced ornamental cactus native to tropical North America. Cultivated and also escaped and naturalized along roadsides of the dry zone.

අලිගැට පේර[Aligata pera]Avacado/Alligator pear (Persea americana)

Native tree of Mexico and Central America. Widely cultivated in home gardens as a fruit tree. 

Crown of thorns (Euphorbia milii)

Native shrub of Madagascar.Widely cultivated in home gardens as an ornamental. 

ගහල[Gahala]/Taro/Elephant's ear (Colocasia esculenta)

An introduced large herb probably with Southeast Asian origin. Now pan-tropically cultivated and also escaped and naturalized in open wet places. Very common from lowlands to intermediate altitude throughout the country. Its underground stem edible and many edible and ornamental cultivars exist. It is considered as an invasive since dense stand of wild Taro displace native flora and block waterways, canals and invade rice fields in the wet zone. 

කිණිහිරිය/ඇට ඉඹුල්/එළ ඉඹුල් [Kinihiriya/Ata Imbul/Ela Ibul]/Torch wood/Yellow Silk Cotton (Cochlospermum religiosum)

Native tree of India. Introduced and also naturalized in rocky places of dry and intermediate zone. Often cultivated near Buddhist temples. Flowering from March to May. Trees deciduous in February and March.

Bonpland's croton (Croton bonplandianus)

An introduced woody herb of dry and often sandy open areas in the low country. Native to South America and naturalized in the Sri Lanka.

Three-leaved Lantana/Cambara (Lantana trifolia)

An introduced perennial herb or sub-shrub native to tropical America. Naturalized along roadsides of the mid hills. Flowering from March to September.

එළ බටු[Ela batu]/Egg plant/Aubergine/Brinjal (Solanum melongena)

An introduced herb with uncertain origin. Often cultivated as the Brinjal to use its purple oblong fruit as a vegetable. Escaped and naturalized plants also occurs along roadsides and waste lands. Wild fruits are also eaten as a curry. Cultivated plants unarmed.

Allamanda blanchetii

Large introduced shrub native to the Brazil. Cultivated as an ornamental in gardens. 

Spiral Ginger (Costus afer)

An introduced large herb native to West Africa. Cultivated as an ornamental and probably also naturalized in some wet zone places*.

* Naturalized plants observed at roadsides of Athweltota and along the Nambapana Ela stream close to the Madakada monastery of Ingiriya.

Kris plant (Alocasia sanderiana)

Globally critically endangered plant naturally found only in two locations, namely Bukidnon and Misamis Occidental (Mindanao Island) of the Philippine. Widely cultivated as an ornamental pot plant in gardens. Not naturalized.

Cutleaf groundcherry (Physalis angulata)

An introduced annual herb native to America. Occasional weed of low moist ground. Common near the Negombo.

බිං දදකිරිය[Bin dadakiriya](Euphorbia thymifolia)

An introduced annual creeping herb. A weed of waste places and cultivated grounds. Also rooting between stones on roadside pavements.

අඹ[Amba]/Mango (Mangifera indica)

An introduced tree widely cultivated in the home gardens of wet zone up to about  600 m a.s.l. Native to India and Myanmar. Fruits edible.

දිය තිප්පිලි/දිය බුලත්[Diya tippili/Diya bulat]Shiny bush/Pepper elder/Pansit (Peperomia pellucida)

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.

Calopo (Calopogonium mucunoides)

Native plant of South America, Central America and West Indies. Introduced into Sri Lanka about 1926 as a cover crop to control soil erosion, green manure and probably also as a fodder for cattle. Naturalized along roadsides, wastelands etc. in the wet zone. Flowering from January to June.

පෙති තෝර[Peti tora]/Pot cassia/Sickle senna (Senna tora [Cassia tora])

Common introduced herb grows in waste places. Leaves edible and also use in Ayurveda and traditional medicine.  Seeds are sometimes used as a coffee substitute. 

Butterfly-pea (Centrosema pubescens)

An introduced twining vine native to tropical America, now naturalized and occurs along roads, waste places etc, probably throughout the island. Flowering from April, September to October and January.

දිය ගෝවා[Diya gova]/Yellow velvetleaf (Limnocharis flava)

Native plant of tropical America. Introduced to Sri Lanka in 1898. Escaped and naturalized widely in marshy areas, shallow ponds and margins of paddy fields from lowlands to mid country.  Flowering and fruiting throughout the year. Young leaves and inflorescence are eaten as a vegetable. 

සියඹලා[Siyabala]/Tamarind/Indian Date (Tamarindus indica)

Native tree of Africa. Introduced to India at least 3000 years ago. Cultivated in Sri Lankan home gardens and along roadsides in villages. Also naturalized in the dry zone. It is used as a timber tree. Fruits edible and leaves, fruits, seeds and barks are used in Ayurvedic medicine.