Abstract:A new species of Sonerila Roxb.(Melastomataceae), S.trinervis Q.W. Lin, is described, illustrated and photographed from Fujian Province,China. The new species is morphologically similar to Sonerila erecta Jack, but easily differs from the latter bystems terete, wingless, puberulous; leaf blade adaxially puberulous, basally 3-veined; petals white, suborbicular, 2 mm in diameter; stamens ca. 2.5 mm in length, and anthers ca. 1 mm in length.