Reinstatement of (Melastomataceae) and recircumscription of , two species endemic to Sri Lanka.

Thwaites, a heterotypic synonym of Thwaites, is re-instated based on recent collections and field observations. The two species differ mainly in their habit, inflorescence structure, floral morphology and lamina morphology. A lectotype and an epitype are designated for , and a lectotype designated for . Both species are confined to the mixed dipterocarp rainforests of Sri Lanka's perhumid south-western 'wet zone'. appears to be restricted to a relatively small range in Ratnapura district, while has a wider distribution in wet zone.