There are 189 species of orchids that naturally occur in the country of which 55 are endemic.
References
- Orchids of Sri Lanka, 2003 by Malik Fernando, Siril Wijesundara and Suranjan Fernando.
- A Revised Handbook of the FLORA OF CEYLON Volume 11, 1981 Edited by M.D.Dassanayake & F.R.Fosberge.
- Resource Inventory of Wilpattu National Park - Final Report By The World Conservation Union (IUCN) Sri Lanka, December 2006