| 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 |
| Solanum cuneifolium Dunal, 1813 |
| Solanum cuspidatum C.V. Morton, 1940 |
| Solanum cymosum Ortega, 1797 |
| Solanum declinatum Sessé & Moc., 1894 |
| Solanum dejectum Fernald, 1900 |
| Solanum diflorum Vell., 1829 |