| Ketmia arborea Moench, 1794 |
| Ketmia syriaca (L.) Scop., 1772 |
| Ketmia syrorum Medik., 1787 |
| Kosteletzkya C. Presl, 1835 |
| Kosteletzkya blanchardii Fryxell, 1977 |
| Kosteletzkya bracteosa M.E. Jones, 1929 |
| Kosteletzkya cordata C. Presl, 1835 |
| Kosteletzkya depressa (L.) O.J. Blanch., Fryxell & D.M. Bates, 1978 |
| Kosteletzkya flavicentrum Fryxell & S.D. Koch, 1987 |
| Kosteletzkya hastata C. Presl, 1835 |
| Kosteletzkya hibiscifolia Standl.,1936 |
| Kosteletzkya hispida C. Presl, 1835 |
| Kosteletzkya hispidula (Spreng.) Garcke, 1853 |
| Kosteletzkya paniculata Benth., 1849 |
| Kosteletzkya pentasperma (Bertero ex DC.) Griseb., 1859 |
| Kosteletzkya ramosa Fryxell, 1977 |
| Kosteletzkya reclinata Fryxell, 1977 |
| Kosteletzkya sagittata C. Presl, 1835 |
| Kosteletzkya stellata Fernald, 1895 |
| Kosteletzkya tampicensis (Moric. ex Ser.) Rose, 1905 |