Justicia is a large, broadly distributed genus of flowering plants in the family Acanthaceae. As of January 2019, there are over 900 accepted species in Kew's Plants of the World Online. * Urb. & Ekman * Champl. * (A.Meeuse) Cubey * (C.B.Clarke) Fourc. * H.S.Lo & D.Fang * Hedrén * (Elmer) C.M.Gao & Y.F.Deng * (Lindau) T.F.Daniel * Wassh. & J.R.I.Wood * Justicia adhatoda L. * (E.Mey. ex Nees) V.A.W.Graham * Benoist * (Nees) Lindau * Benoist * Leonard * Hedrén * Alain & Leonard * Stearn * (Rusby) Wassh. & J.R.I.Wood * Leonard * W.W.Sm. * Benoist * Champl. * Justicia alexandri R.Atk. * (Leonard) Durkee * T.F.Daniel * T.F.Daniel * Justicia alpina Lindau * Leonard * Vollesen * C.B.Clarke * Hedrén * (Nees) Lindau * D.Fang & H.S.Lo