වැරණිය[Veraniya](Hedyotis fruticosa)

An indigenous small shrub grows on open secondary vegetation and rocky areas on mountain tops up to about 1000 m elevations

Woodland false buttonweed (Spermacoce remota [Syn: Spermacoce assurgens])

Introduced annual herb native to tropical America. Naturalized along roadsides and waste places. 

Didymoplexis pallens

Rare terrestrial, leafless and saprophytic orchid species grows under shade of trees in carpet of fallen and decaying leaves of the wet lowland forests.

Wormbush/Pinkroot(Spigelia anthelmia)

An introduced annual herb native to tropical America. Naturalized along roadsides, home gardens and waste places in Southern and western part of the Country.

බැවිල[Bavila]/Heart Leaf Fan Petals(Sida cordata)

Common indigenous prostrate or ascending slender herb grows in grasslands, waste areas and roadsides, mainly in the dry lowlands. Whole plant used in Ayurveda medicine.

Thyas coronata

Location - Sri Jayawardenapura, Kotte.
Host Plant - Flowers (Only first instar larvae) and tender leaves (Larvae of all instars) of Rangoon creeper/Drunken sailor(Quisqualis indica) - (Sujeeva Gunasena, ‎ Personal communication, October 31, 2015)
External Links - http://www.inaturalist.org/observations/1890501

කටු තම්පලා[Katu tampala]/Spiny amaranth/Prickly amaranth (Amaranthus spinosus)

Very common introduced weed occurs along roadsides, waste and disturbed grounds and in gardens. Flowering throughout the year. The young leaves are eaten as a kind of spinach and whole plant especially leaves and roots are medicinal.

මිදි ගස්/මහ මිදි/හීන් මිදි/වල්-වෙල්-මිදි [Midi Gas/Maha Midi/Heen Mii/Wal-Wel-Midi]/Headache Tree(Premna serratifolia [Syn: Premna obtusifolia/Premna divaricata])

An indigenous shrub or tree common in coastal areas and mangroves. Flowering from December to March and August to September. Fruits black when ripe. Leaves and roots used in medicine and wood in constructions  industry.

ගස් දුම්මැල්ල/කයිල/වැල් කයිල [Gas dummella/Kaila/Wel Kayila] (Phyllanthus reticulatus)

Common indigenous shrub or small tree occurs in secondary vegetation from sea level to 1000 m altitude. Bark, roots, stem, leaves and fruits are used in medicine.

ගොඩ කිරිල්ල[Goda Kirilla]/Indian Elm (Holoptelea integrifolia)

Native tree occurs in dry lowland forests. Flowering from March to April and fruiting from April to June. Wood heavy and strong. 

Asystasia intrusa

An introduced herb native to Malaysia. It occurs in lightly shaded locations, especially in the hill country, probably escaped from gardens. 

Erebus ephesperis [Nyctipao crepuscularis]

Expanse - 8-10 cm

Reference - The Lepidoptera of Ceylon - F. Moore, F.Z.S. Vol 3 Page 148.

External Links -  http://www.inaturalist.org/listed_taxa/3589369

Sonerila rhombifolia

Rather rare endemic erect herb occurs in Southwestern wet lowland forests. Sonerila rhombifolia grows sympatrically with the Sonerila silvatica.

කහ කෝන[Kaha-kona] (Senna spectabilis[Cassia spectabilis])

Native tree of the South America. Introduced and planted as an ornamental, mostly in the hill country near tea plantations. 

හීන් උඳුපියලිය[Heen-Undupiyaliya]/Creeping tick threefoil/Tick clover(Grona triflora [Syn: Desmodium triflorum])

An indigenous prostrate perennial herb very common on roadsides, open grounds, lawns,etc from lowlands to about 600 m elevations. Flowering from June to October.

Gomphandra tetrandra

Rather uncommon shrub or small tree occurs in primary and secondary wet evergreen forests from 75-1200 m a.s.l. Ripe berries are white.