| Nasturtium williamsii (Britton) Standl., 1931 |
| Neobeckia Greene, 1896 |
| Neolepia W.A. Weber, 1989 |
| Nerisyrenia Greene, 1900 |
| Nerisyrenia baconiana B.L. Turner, 1994 |
| Nerisyrenia camporum (A. Gray) Greene, 1900 |
| Nerisyrenia castillonii Rollins, 1941 |
| Nerisyrenia gracilis I.M. Johnst., 1941 |
| Nerisyrenia gypsophila J.D. Bacon, 1978 |
| Nerisyrenia incana Rollins, 1939 |
| Nerisyrenia johnstonii J.D. Bacon, 1978 |
| Nerisyrenia linearifolia (S. Watson) Greene, 1900 |
| Nerisyrenia linearifolia var. linearifolia (S. Watson) Greene, 1900 |
| Nerisyrenia linearifolia var. mexicana J.D. Bacon, 1978 |
| Nerisyrenia mexicana (J.D. Bacon) B.L. Turner, 1993 |
| Nerisyrenia powellii J.D. Bacon, 1978 |
| Nerisyrenia turneri J.D. Bacon, 1978 |
| Neslia Desv., 1815 |
| Neslia paniculata (L.) Desv., 1815 |
| Nesodraba Greene, 1897 |