Kokoona zeylanica, known in Sinhala as Kokun is a species of plant

Plant

Plants are living organisms belonging to the kingdom Plantae. Precise definitions of the kingdom vary, but as the term is used here, plants include familiar organisms such as trees, flowers, herbs, bushes, grasses, vines, ferns, mosses, and green algae. The group is also called green plants or...

 in the Celastraceae

Celastraceae

The Celastraceae , is a family of about 90-100 genera and 1,300 species of vines, shrubs and small trees, belonging to the order Celastrales...

 family. The genus is classified in the family Hippocrateaceae

Hippocrateaceae

Hippocrateaceae Juss. previously consisted of about 150 tropical and subtropical species of shrubs and lianes, and is now included in the Celastraceae family...

 by some authorities.

It is endemic to Sri Lanka

Sri Lanka

Sri Lanka, officially the Democratic Socialist Republic of Sri Lanka is a country off the southern coast of the Indian subcontinent. Known until 1972 as Ceylon , Sri Lanka is an island surrounded by the Indian Ocean, the Gulf of Mannar and the Palk Strait, and lies in the vicinity of India and the...

. It is extant at Adam's Peak

Adam's Peak

Sri Pada , is a tall conical mountain located in central Sri Lanka...

 and at Kanneliya.

The species has been listed by the IUCN as threatened.

Uses

The Kokun is regarded as a medicinal plant traditionally used in a number of conditions. The seed oil from this plant is effective as a leech repellent.

The inner bark has been used by jewellers as a polish.