| Solanum calvum Bitter, 1913 |
| Solanum candelarianum Bukasov, 1930 |
| Solanum capsicastrum Link ex Schauer, 1833 |
| Solanum carolinense L., 1753 |
| Solanum cervantesii Lag., 1816 |
| Solanum cervantesii subsp. glabrum (Dunal) C.V. Morton ex S. Knapp, Bohs, Nee & D.M. Spooner, 2005 |
| Solanum chiapense Brandegee, 1915 |
| Solanum chloropetalon Schltdl., 1847 |
| Solanum ciliare Willd., 1809 |
| Solanum ciliatum Lam., 1794 |
| Solanum ciliolatum M. Martens & Galeotti, 1845 |
| Solanum circinatum Bohs, 1995 |
| Solanum concisum Dunal, 1852 |
| Solanum confusum Correll, 1952 |
| Solanum connatum Correll, 1952 |
| Solanum cornigerum André, 1868 |
| Solanum coronopus Dunal, 1852 |
| Solanum cortex-virens Dunal, 1852 |
| Solanum coyoacanum Bukasov ex Rybin, 1929 |
| Solanum crassifolium Ortega, 1800 |