Hartliella txitongensis (Linderniaceae), a new species from Mozambique

Summary Hartliella txitongensis Osborne & Eb.Fisch., a species new to science from Niassa Province in Northern Mozambique, is described and illustrated. Hartliella txitongensis is the only species of Hartliella known from outside the Upper Katanga region of the Democratic Republic of the Congo and the adjacent region of Zambia. The species is provisionally assessed as Critically Endangered under IUCN criterion B and its potential to be a metallophyte is highlighted. A key to the five species of Hartliella is provided.