<i>Phreatia tinukariensis</i> ( <i>Orchidaceae</i> : <i>Thelasiinae</i> ), a new species from Sulawesi, Indonesia

A new species of Phreatia sect. Caulescentes from Sulawesi, Indonesia, Phreatia tinukariensis is described and illustrated. It closely resembles P . navicularis , described from Maluku (Seram, Indonesia), but differs in the shape of the labellum, in particular its basal part and the position of the circular thickenings on the labellum blade. A comparison between the two is presented in a table. A key to the Indonesian species of sect. Caulescentes is provided.