| Nasturtium | Nasturtium officinale |
| Nettle, False | Boehmeria cylindrica |
| Nettle, Stinging | Urtica dioica |
| Nightshade, American Black | Solanum ptychanthum |
| Nightshade, Carolina | Solanum carolinense var. carolinense |
| Nightshade, Climbing | Solanum dulcamara |
| Nightshade, Ground-cherry | Solanum sarrachoides |
| Nightshade, Southern Broadleaf Enchanter's | Circaea canadensis subsp. canadensis |