| Kleinia peduncularis Kuntze, 1891 |
| Kleinia porophyllum (L.) Willd., 1804 |
| Kleinia ruderalis Jacq., 1760 |
| Kleinia tagetoides Kunth, 1818 |
| Kleinia viridiflora Kunth, 1818 |
| Koanophyllon Arruda, 1816 |
| Koanophyllon albicaule (Sch. Bip. ex Klatt) R.M. King & H. Rob., 1971 |
| Koanophyllon albicaule var. albicaule (Sch. Bip. ex Klatt) R.M. King & H. Rob., 1971 |
| Koanophyllon celtidifolium (Lam.) R.M. King & H. Rob., 1971 |
| Koanophyllon coixtlahuacum B.L. Turner, 2009 |
| Koanophyllon concordianum B.L. Turner, 2009 |
| Koanophyllon coulteri (B.L. Rob.) R.M. King & H. Rob., 1971 |
| Koanophyllon galeanum (B.L. Turner) B.L. Turner, 1998 |
| Koanophyllon galeottii (B.L. Rob.) R.M. King & H. Rob., 1978 |
| Koanophyllon gracilicaule (Sch. Bip. ex B.L. Rob.) R.M. King & H. Rob., 1975 |
| Koanophyllon guerreroanum B.L. Turner, 1987 |
| Koanophyllon hintoniorum (B.L. Turner) Velazco, 2010 |
| Koanophyllon hylonomum (B.L. Rob.) R.M. King & H. Rob., 1971 |
| Koanophyllon hypomalacum (B.L. Rob.) R.M. King & H. Rob., 1971 |
| Koanophyllon jinotegense R.M. King & H. Rob., 1991 |