Hortonia is a genus of trees and shrubs of the family Monimiaceae. It is endemic to Sri Lanka and comprises three species.
Species Three species are accepted. Hortonia angustifolia (Thwaites) Trimen Hortonia floribunda Wight ex Arn. Hortonia ovalifolia Wight
References
http://www.theplantlist.org/1.1/browse/A/Monimiaceae/Hortonia/