| Solanum multinervium Dunal, 1852 |
| Solanum nannodes Correll, 1952 |
| Solanum nelsonii Correll, 1958 |
| Solanum neoantipoviczii Bukasov, 1930 |
| Solanum nesophilum H. St. John, 1988 |
| Solanum nigrescens M. Martens & Galeotti, 1845 |
| Solanum nigrum L., 1753 |
| Solanum nodiflorum Jacq., 1786 |
| Solanum nyctaginoides Dunal, 1852 |
| Solanum oaxacanum Dunal, 1852 |
| Solanum obtusifolium Dunal, 1816 |
| Solanum ochraceo-ferrugineum (Dunal) Fernald, 1900 |
| Solanum oligospermum Bitter, 1913 |
| Solanum olivaeforme Donn. Sm., 1889 |
| Solanum orbiculatibaccatum Lechn., 1980 |
| Solanum ovandense Lundell, 1943 |
| Solanum palmeri Vasey & Rose, 1888 |
| Solanum papita Rydb., 1924 |
| Solanum pavonii Dunal, 1852 |
| Solanum peckii S.F. Blake, 1917 |