Black Wattle (Acacia mearnsii)

An introduced tree native to Australia. Planted in some locations in the higher hills. An invasive tree in some other countries where this tree has been introduced (Vlas J. & Vlas J., 2014). Dasanayaka M.D & Fosberg F.R, 1980. recorded it from Pattipola. Few trees can be still observed along the road from Pattipola to Ohiya via Horton Plains National Park. Will it be a threat to the native and rare endemic plants of the Horton Plains National Park sooner or later?

Dasanayaka M.D & Fosberg F.R, 1980, A Revised Handbook to the Flora of Ceylon Volume 1
Vlas J. & Vlas J., 2014, Illustrated field guide to the flowers of Sri Lanka, Volume 2

Small hop clover/Least hop clover (Trifolium dubium)

An introduced herb native to Europe, Asia minor and Northern Asia. Naturalized along roadsides and open places among grasses in the higher hills of Central and Uva provinces.

Flower - 4mm long in heads of 5 - 7 mm
Leaflets- 5 - 10 mm long

මහ වල් කොල්ලු (Rhynchosia minima)

 An indigenous prostrating or trailing small vine occurs in the low country. Common in the dry zone and occasionally found also in the wet zone. Flowering all the year round. 

Indigofera oblongifolia

An indigenous shrub of the the dry zone. Mostly in the northern part of  the country.

මූදු අවර/වල් අවර [Mudu Awara/Wal Awara](Canavalia cathartica [Syn: Canavalia virosa])

An indigenous vine common in coastal lowland scrubs and forests edges, mostly in the dry zone and lower hill country. 

කුකුල් කටු/ගිනි අන්දර[Kukul Katu/Gini Andara]/Cockspur Thorn (Vachellia eburnea [Syn: Acacia eburnea])

Large or small bush or small tree common in the dry areas, especially near the coast. Native plant of India, Arabian peninsula and Afghanistan and introduced to Sri Lanka. (As per Vlas J. & J. de, 2014 but probably a Native of Sri Lanka)  

මුං/මුං ඇට/බූ මෑ[Mun/Mun eta/Bu me]/Green gram/Jerusalem pea/Mung bean/(Vigna radiata)

An erect or climbing herb. Cultivated crop of ancient uncertain origin. Also naturalized in the dry areas. Pods eaten raw or cooked. Whole or split seeds used in soup and other preparations. 

Crotalaria scabrella

An indigenous erect or procurement herb grows on patanas and sometime in roadside open places in the montane zone. 

අලු පිල[Alu pila] (Tephrosia tinctoria)

An indigenous shrubby perennial found along roadsides among bushes in the wet zone, intermediate zone and the hill country up to 1400 m a.s.l.

Indigofera spicata

 Common introduced herb occurs mainly in the hill country road sides and weedy places. Sometime introduced in pastures.

Giant mimosa/Giant sensitive Tree (Mimosa pigra)

An introduced  shrub native to the Mexico, Central and South America. First identified at the Mahaweli river bank near Kandy in 1996 (But probably colonized there since early 1980's.). It is now considered as a invasive plant and widely distributed along flood plains of some rivers and along roads when sand from the river bed has been used for road constructions. 

මාර/පිනි මාර/පාරෙ මාර[Mara/Pini Mara/Para Mara]/Rain tree(Samanea saman[Syn: Albizia saman ])

An introduced tree native to the South America. Rain tree was introduced to Sri Lanka in 1851 and since then widely planted as an avenue tree along many roads. Its leaves and pods are used as fodder and wood can be used to make furniture. 

මෑ කරල්/ ලී මෑ/වඳුරු මෑ[Me Karal/Li Me/Wanduru Me]/Black-eye Bean/ Cowpea (Vigna unguiculata)

Trailing or climbing vine cultivated widely throughout the country as a food crops. 

Zornia gibbosa

Common native herb found in lawns and among short vegetation in the dry zone.

Flower size - 1-1.2 cm long

යක්බේරිය[Yakberiya]/Rattle-box/Bird flower (Crotalaria laburnifolia)

Common native large herb of the low country. 

මස් මොර [Mas Mora] (Adenanthera aglaosperma)

Rather rare endemic tree found in southwestern wet lowland forests.

*Adenanthera bicolor Moon is a misapplied name which has been erroneously used to refer to Adenanthera aglaosperma Alston. (http://www.theplantlist.org/tpl1.1/record/ild-50512)

Dendrolobium triangulare

An indigenous shrub grows in openings in dry and intermediate zone forests.

Thornless mimosa (Aeschynomene americana)

An introduced herb native to tropical and subtropical America. Cultivated as a green-manure cover crop and as hay. Escaped and naturalized along roadsides and waste places.

ගස් ගොනික[Gas gonika] (Pseudarthria viscida)

Common native erect, trailing or more or less twining perennial herb in light woodlands of the low country up to about 1000 m elevations. 

Crotalaria quinquefolia

Common native annual herb occurs in the dry zone areas and occasionally also in the hill country.