| Justicia pumila F. Dietr., 1803 |
| Justicia purpusii (Brandegee) D.N. Gibson, 1972 |
| Justicia quadrifida Vahl, 1804 |
| Justicia ramosa (Oerst.) V.A.W. Graham, 1988 |
| Justicia reflexiflora Vahl, 1804 |
| Justicia reptans Sw., 1788 |
| Justicia resupinata Vahl, 1804 |
| Justicia runyonii Small, 1930 |
| Justicia rzedowskii (Acosta) T.F. Daniel, 1995 |
| Justicia salasiae T.F. Daniel & E.J. Lott, 2012 |
| Justicia salma-margaritae Acosta, 2007 |
| Justicia salviiflora Kunth, 1818 |
| Justicia salviifolia Kunth, 1818 |
| Justicia santelisiana Acosta & T.F. Daniel, 1993 |
| Justicia scabra Vahl, 1804 |
| Justicia scorpioides L., 1762 |
| Justicia sessilis Jacq., 1760 |
| Justicia sexangularis L., 1753 |
| Justicia silvicola D.N. Gibson, 1972 |
| Justicia soliana Standl., 1924 |