Hortonia angustifolia (Thwaites) Trimen (1885:75)

Napath Wewiya

Taxonomy & Nomenclature

Synonym/s: Hortonia floribunda var. angustifolia Thwaites in Enum. Pl. Zeyl.: 12 (1858)

Conservation Status

Rediscovered [by implication]

IUCN RedList status: Critically Endangered

Considered possibly Extinct by (WCMC, 1998), but now known to be exant (Ratnayake et al., 2008; POWO, 2025), and thus Rediscovered by implication.

Distribution & Habitat

south-west Sri Lanka

Biology & Ecology

Hypodigm

Media

References

Dassanayake (ed.). (1996). A Revised Handbook to the Flora of Ceylon 10: 1-426. Oxford & IBH Publishing Co. PVT. LTD., New Delhi, Calcutta.

Green, M. J. B. and Gunawardena, E. R. N. (comps.). (1997). Designing an optimum protected areas system for Sri Lanka's natural forests. Prepared by IUCN-The World Conservation Union and the World Conservation Monitoring Centre for the Food and Agriculture Organisation (FAO) of the United Nations. (unpublished).

Gunatilleke, C. V. S. and Gunatilleke, I. A. U. N. (1985). A conservation and protection plan for the Sinharaja Forest. Draft. Includes list of plants and their uses and endemism (unpublished).

Gunatilleke, I. A. U. N. and Gunatilleke, C. V. S. (1991). Threatened woody endemics of the wet lowlands of Sri Lanka and their conservation. Biological Conservation 55(1): 17-36.

Oldfield, Sara, Lusty, Charlotte and MacKinven, Amy (compilers). (1998). The World List of Threatened Trees. Cambridge, U.K.: World Conservation Press. 650 pp.

POWO. (2025). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 19 July 2025]

Ratnayake, Rukmal, Bandara, B. M. Ratnayake, Wijesundara, Siril, Macleod, John K., Simmonds, Peta and Karunaratne, Veranja. (2008). Bioactivity and chemistry of the genus Hortonia. Natural Product Research 22(16): 1393-1402. https://doi.org/10.1080/14786410701722433

WCMC (World Conservation Monitoring Centre). (1998). Hortonia angustifolia. The IUCN Red List of Threatened Species 1998: e.T32601A9716240. https://dx.doi.org/10.2305/IUCN.UK.1998.RLTS.T32601A9716240.en. Downloaded on 06 May 2017.