A synopsis of Ruellia L. (Acanthaceae) in Australia

13 species of Ruellia L. (including some formerly included under Dipteracanthus Nees, Stephanophysum Pohl or Blechum P.Browne) are indigenous or naturalised in Australia.These are briefly treated with notes on distribution and habitat.Three new combinations are made, viz.Ruellia australasica (F.Muell.)A.R.Bean, Ruellia chichesterensis (Trudgen & de Kock) A.R.Bean and Ruellia dalyensis (R.M.Barker) A.R.Bean, and a new name Ruellia sicca A.R.Bean nom.nov.An identification key to all species is provided.