Watsonia wilmsii is a plant belonging to the genus Watsonia. The species is endemic to Mpumalanga and occurs on the Drakensberg escarpment east of Lydenburg. It has an area of 812 km<sup>2</sup> and has lost habitat to plantations; the threat no longer exists because the remaining subpopulations are in protected areas. The plant is found on montane grassland, slopes at altitudes of 1 500 m.