අඳු\ගඳකුප්ප[Andu/Gadhakuppa]/Long Coriander/Stink weed (Eryngium foetidum)

An introduced herb native to tropical America. Cultivated and also naturalized along forest edges, shaded or sunny disturbed areas, stream banks, etc. from 550 - 800 m around Peradeniya Royal Botanical Garden. The plant has a very strong unpleasant bug like smell.

මදුරු තලා [Maduru Thala]Sacred Basil/Holy Basil (Ocimum tenuiflorum)

Common native herb occurs along roadsides and open waste places from lowlands to about 530 m elevations. Flowering from December to August. 

පතොක් [Pathok]Velvet opuntia/Nopales opuntia (Opuntia cochenillifera)

An introduced high-growing cactus native to Southern Mexico. Cultivated in gardens as an ornamental and also as a hedge plant.

කටු කරඬු[Katu Karadu]/Yellow Hedge Barleria (Barleria prionitis)

Common indigenous prickly shrub in open waste places and scrub lands in the dry zone. Sometimes also cultivated as a hedge plant. in village dwellings. Flowering from March to August. Whole plant, especially its roots medicinal.

Coral vine/Mexican Creeper (Antigonon leptopus)

An introduced large herb climbing with long tendrils over walls, hedges and other vegetation. Native to the central America. Flowering throughout the year. Cultivated as an ornamental and also escaped and naturalized.

ඒකාවේරිය/නකුල/රත් ඒකාවේරිය[Ekaveriya/Nakula/Rath Ekaveriya]/Indian Snakeroot(Rauvolfia serpentina)

An indigenous sub - shrub  of secondary scrub lands and grassy places of the wet lowlands up to about 700 m elevations. Due to not observing of it during the 'Flora of Ceylon project' Herbert Huber  noted in 1983 that it may have been possibly extinct in the wild due to intense exploitation (Dasanayaka M.D. & Fosberg F.R., 1983, Flora of Ceylon Vol 4). However 2012 Red list categorized it under the Endangered status. It is an important medicinal plant.

Brazilian Red Cloak (Megaskepasma erythrochlamys)

An introduced ornamental shrub native to Venezuela.  Cultivated in gardens.

Mexican poppy (Argemone mexicana)

Native plant of tropical and subtropical North America. Introduced and naturalized in waste and disturbed places, usually near houses. 

බිං දෙළුම්/ඇත් පිටවක්කා[Bin delung/Et pitawakka](Synostemon bacciformis [Syn: Sauropus bacciformis])

An indigenous prostrating herb of sandy saline areas near sea, inland sandy areas near tanks and tidal flat margins.

Dog's tongue (Pseudelephantopus spicatus)

A recent addition to the Flora of Sri Lanka*. An introduced herb native to the Caribbean. First time recorded from altitude 400 m of Peak wilderness. Numerous naturalized plants observed at Meethirigala forest reserve of Gampaha district (Personal observation, 2016/01/29).

* Illustrated field guide to the flowers of Sri Lanka Volume 2 - J. & J de Vlas, 2014

Gaertnera walkeri

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

Queen of flowering trees/Pride of Burma (Amherstia nobilis)

Native tree of  Myanmar (Former Burma). Introduced to the Peradeniya botanical garden in 1860 and since then it has been cultivated as an ornamental tree. The Queen of flowering trees is now extinct in the wild.

ඇත් අඩි[Eth adi] (Elephantopus scaber)

Common indigenous herb grows along roadsides, patanas, scrub lands, plantations and as a weed in lawns from lowlands to 2100 m  altitudes in the hill country.Roots and leaves medicinal.

Tail flower/Flamingo flower/Laceleaf (Anthurium andraeanum)

Widely cultivated ornamental pot plant native to Colombia and Ecuador. 

ගඟ වැරැල්ල [Ganga Werella](Phyllanthus myrtifolius)

An endemic shrub occurs along watercourses in forests from 300 to 600 m altitudes. Also planted in home gardens as an ornamental hedge plant.

Cardinals guard (Pachystachys coccinea)

Native shrub of French Guinea, Brazil, and Peru. Introduced and cultivated in gardens. 

හැමනිල්ල[Hemanilla] (Pogostemon auricularius)

An indigenous annual herb occurs among short grass along roadside ditches, paddy field borders, and boggy places in the wet lowlands up to about 1000 m a.s.l. Flowering from October to June. 

කරාබු නැටි[Karabu nati]Clove (Syzygium aromaticum)

An introduced tree native to the Moluccas. Cultivated in intermediate to wet zone home gardens. Buds including the calyx tube are the cloves of commerce, a spice. Also use in traditional medicine. Widely cultivated in the intermediate zone north of Kandy.

Surinam Quassia (Quassia amara)

Native tree of Guiana and tropical South America. Introduced and cultivated in Sri Lanka mainly as an ornamental. It is also used in traditional medicine in some countries and can be used as an insecticide.

Oleander Hawk Moth (Daphnis nerii)

Location - Kotte.

Wing expanse - 8 - 10 cm

Reference - The Lepidoptera of Ceylon - F. Moore, F.Z.S. Vol 2 Page 14-15.

External links -  http://www.inaturalist.org/taxa/51996-Daphnis-nerii
Larval host plants - "Feeds on Oleander (Nerium oleander ) and Cinchona" - Moore, F.Z.S., 1882-3, Desert rose (Adenium obesum) & වතු-සුද්ද/Sri Lanka Jasmine/Grape-Jasmine/Wathu-Sudhdha (Tabernaemontana divaricata) - (Sujeeva Gunasena, Personal communication )