| Swartsia J.F. Gmel., 1791 |
| Swartsia grandiflora J.F. Gmel., 1791 |
| Swartsia guttata (D. Don) Standl., 1924 |
| Synantheroides Bitter, 1919 |
| Tehuacanae M. Martínez, 1999 |
| Torva Nees, 1834 |
| Trianaea Planch. & Linden, 1853 |
| Trianaea neovisae Romero, 1972 |
| Trianaea speciosa (Drake) Soler., 1898 |
| Trigonophyllae Goodsp., 1945 |
| Tzeltalia E. Estrada & M. Martínez, 1998 |
| Tzeltalia amphitricha (Bitter) E. Estrada & M. Martínez, 1998 |
| Tzeltalia calidaria (Standl. & Steyerm.) E. Estrada & M. Martínez, 1998 |
| Tzeltalia esenbeckii M. Martínez & O. Vargas, 2005 |
| Viscosa (Rydb.) Menzel, 1951 |
| Withania Pauquy, 1825 |
| Withania melanocystis B.L. Rob., 1891 |
| Withania sordida Dunal, 1852 |
| Witheringia L'Hér., 1788 |
| Witheringia affinis (C.V. Morton) Hunz., 1969 |