| Nicotiana L., 1753 |
| Nicotiana attenuata Torr. ex S. Watson, 1871 |
| Nicotiana clevelandii A. Gray, 1878 |
| Nicotiana glauca Graham, 1828 |
| Nicotiana longiflora Cav., 1802 |
| Nicotiana mexicana Schltdl., 1840 |
| Nicotiana nudicaulis S. Watson, 1883 |
| Nicotiana obtusifolia M. Martens & Galeotti, 1845 |
| Nicotiana obtusifolia var. obtusifolia M. Martens & Galeotti, 1845 |
| Nicotiana palmeri A. Gray, 1878 |
| Nicotiana pilosa Dunal, 1852 |
| Nicotiana plumbaginifolia Viv., 1802 |
| Nicotiana repanda Willd. ex Lehm., 1818 |
| Nicotiana rustica L., 1753 |
| Nicotiana stocktonii Brandegee, 1899 |
| Nicotiana tabacum L., 1753 |
| Nicotiana trigonophylla Dunal, 1852 |
| Nicotianeae G. Don, 1838 |
| Nierembergia Ruiz & Pav., 1794 |
| Nierembergia angustifolia Kunth, 1818 |