Firebush/Hummingbird bush/Scarlet bush/Redhead(Hamelia patens)

Native shrub or small tree of tropical and sub tropical America. Introduced and widely cultivated in home gardens.

අහු[Ahu]/Great Morinda/Indian Mulberry (Morinda citrifolia)

Common native shrub or small tree occurs mainly along the coast in the wet zone. Also cultivated in inland places. Flowering from September to October. Its roots, leaves and fruits are used in traditional medicine.

Gaertnera walkeri

An endemic shrub occurs in the hill country forests from 900 to 2000 m a.s.l.

Ophiorrhiza pectinata

An indigenous erect herb occurs in lowland rain forests. 

Shrubby false buttonweed (Spermacoce verticillata)

Native perennial herb of  Tropical America. Introduced and naturalized along roadsides, waste lands,etc. Rather common weed.  

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. 

කොළොන්[Kolon] (Adina cordifolia [Syn: Haldina cordifolia])

An indigenous large tree common in dry and intermediate zone forests. Juice of bark is used to kill worms in sores and wood use in construction and carving industry. 

Spermacoce exilis [Spermacoce mauritiana]

An introduced annual herb native to tropical America. Naturalized in shady places and among grass (in the wet lowlands ?)

Oval leaf false buttonweed (Spermacoce alata [Syn: Spermacoce latifolia])

An introduced herb native to the tropical America. Common weed in waste places, gardens, roadsides, etc.

ගල් කරඳ/පනකරව පඳුරු[Gal Karanda/Panakarawa panduru]/Ceylon Boxwood (Psydrax dicoccos)

Common indigenous shrub or small tree occurs in low and middle elevations. 

Knoxia zeylanica

An endemic perennial herb occurs in lowland forests and open places in the wet  zone

Acranthera ceylanica

An endemic perennial herb occurs in moist shady places, often near streams in lower montane zone.

දත් කැටිය/වල් ඒකාවේරිය [Dat-katiya/Wal-Ekaweriya] (Ophiorrhiza mungos)

An indigenous herb common in damp places of primary and secondary wet lowland forests. 

Pavetta agrostiphylla

An endemic shrub or treelet occurs in southwestern wet evergreen forests.

කුකුරුමාන් [Kukuruman]/Spiny randia/Emetic-nut/False guava (Catunaregam spinosa)

An indigenous shrub or small tree common in dry scrub lands, monsoon forest understory, coastal areas and open secondary vegetation in the low country. 

අපස්ස වැල්[Apassa wel] (Sabicea ceylanica [Schizostigma hirsutum])

Rather common endemic creeping herb occurs in wet evergreen forests

Knoxia platycarpa var. hirsuta [Syn: Knoxia hirsuta]

An endemic herb common in forests and open areas of montane zone. Flowering throughout the year.

Mussaenda erythrophylla

Mussaenda erythrophylla is an erect shrub introduced as an ornamental plant and widely cultivated in home gardens. It is said to have originated in the Congo. Its pinkish sepals are more prominent than small yellow flowers (insert)

Brazil pusley/Mexican clover (Richardia brasiliensis)

Perennial prostrate herb native to Brazil, introduced and now very common weed along roadsides and in plantations and gardens from lowlands to the hills. It can be easily distinguished from all other similar small white flower plants by its 6 lobes corolla, since all other small white flowers in Sri Lanka have 4 or 5 corolla lobes.