කනේරු[Kaneru]/Oleander (Nerium oleander)

An introduced shrub or small tree native to the Mediterranean. Widely cultivated in gardens as an ornamental plant. Wild ancestors of this plant has pink flowers. Varies cultivars have white, red or dark pink flowers.

Tropical kudzu (Neustanthus phaseoloides [Syn: Pueraria phaseoloides)

An indigenous vine native to Southeast Asia. It is also believed that it was introduced as a ground cover and fertilizer to enhance fertility in coconut plantations and naturalized along roadsides and abandoned cultivated grounds. Often creeping over low vegetation. Flowering from November to March.

බෙරිය[Beriya]/Black Mangrove (Lumnitzera racemosa)

Common native shrub or small tree occurs in most mangrove swamps.

Brown-Banded Hunter Hawkmoth (Theretra silhetensis)

Location - Polgasowita.

Reference - The Lepidoptera of Ceylon - F. Moore, F.Z.S. Vol 2 Thretra nessus of Page 22 & Plate 85?

External links -  http://www.inaturalist.org/observations/1803331

Rubus rugosus

An indigenous scrambling shrub grows under shade in bushy thickets along forest edges or in dense mossy forests of upper montane zone above 2000 m a.s.l. Flowering from February to May, July and November to December.

Littlebell/Three-lobed Morning Glory (Ipomoea triloba)

An introduced and naturalized vine native to tropical America and West Indies. Very common in waste lands, paddy field margins, fences, etc. Due to its common occurrences near paddy fields, it is believed that Littlebell was introduced contaminant in seed rice. 

Enicostema axillare

Common indigenous perennial herb, occurs in open sandy places among sparse grass, close to the beach in the dry zone. Flowering throughout the year. 

Rubber vine/Madagascar rubber vine/Purple trumpet (Cryptostegia grandiflora)

An introduced twining vine native to the Madagascar and neighboring islands. Cultivated in gardens as an ornamental. As per Trimen often naturalized in Sri Lanka near the shore (A Revised Hand Book to the Flora of Ceylon Vol 4)*. It is considered as a notorious invasive plant in tropical Australia.

* Probable naturalized vines observed at Karukkupone area, north of Chilaw.

මණ්ඩ/මඩ ගස්[Manda/Mada Gas]/Indian Mangrove/White Mangrove (Avicennia officinalis)

An indigenous shrub or small tree occurs in salt marshes, brackish places along the seashore and mangrove swamps. Flowering from August to October.

වැල් කරල් හැබ[Wel karal Haba]/Forest Burr/Creeping Cock's Comb(Pupalia lappacea var. orbiculata)

An indigenous herb occurs as two varieties in the island.

•  P, l, lappacea - Grows open dry places along forest edges.
•  P. l. orbiculata (Above Picture) - Common in the sandy places behind the shoreline.

Launaea sarmentosa

Common native prostrate herb occurs on sandy seashores above the high tide mark. Flowering from July to May and probably throughout the year. 

ඉකිලි/කටු ඉකිලි[Ikili/Katu Ikili]/Sea Holly (Acanthus ilicifolius)

Large indigenous perennial herb. Common along banks of estuaries and lagoons. Also occurs in marshy lands close to the sea shore. 

බූ තෙදිය/සෙවන් මැදිය[Bu thedhiya/Sewan medhiya]/Furniture Leaf (Ficus exasperata)

Common native tree grows in wet zone lowland areas up to 1000 m a.s.l. Flowers enclosed in figs. Leaves formerly used as sand papers

ගැඩුඹ[Gadumba]/Charcoal tree (Trema orientale [Syn: Trema orientalis])

Small to medium size native tree, very common in waste places and cleared areas up to 1525 m elevations. Flowering and fruiting from January to June. 

Bolivian Sunset Gloxinia (Seemannia sylvatica [Syn: Gloxinia sylvatica])

An introduced ornamental perennial. Cultivated mostly in the hill country home gardens.  

කොට දිඹුල[Kota Dimbula] (Ficus hispida)

Common indigenous small tree or shrub grows in open areas, river banks and secondary forests up to 1200 m a.s.l. Flowers enclosed in figs. Whole plant medicinal.

Railway Glory (Ipomoea cairica)

An indigenous vine occurs in waste lands, roadsides, stream banks, cultivated grounds, thickets and hedges. Also widely cultivated as an ornamental.  Original home of the plant is uncertain.

Asystasia chelonoides

An indigenous herb or small shrub common under shade of forests of the wet hill country, often close to streams. Flowering from January to June and August to October. 

කොස්[Kos]/Jak(Artocarpus heterophyllus)

Common introduced tree with unknown origin (Possibly South India). Widely cultivated (And also naturalized) due to its edible fruits which ripe mainly during March-April months of the year. Wood used in construction industry and to make furniture. Leaves - fodder. Two forms occurs in Sri Lanka
1) වරකා[Waraka] - Has firm pulp in the ripe fruits.
2) වැල [Wala] - Soft pulp in the ripe fruits.

Common Forest Thunbergia/Sweet Clock Vine (Thunbergia fragrans)

An indigenous slender twiner occurs along forest edges from lowlands to higher hills. Flowering throughout the year.