| Solanum lanceolatum Cav., 1795 |
| Solanum lanciforme Rydb., 1924 |
| Solanum laurifolium Mill., 1768 |
| Solanum lentum Cav., 1797 |
| Solanum lepidotum Humb. & Bonpl. ex Dunal, 1816 |
| Solanum leprosum Ortega, 1800 |
| Solanum leptosepalum Correll, 1952 |
| Solanum lignescens Fernald, 1897 |
| Solanum longiconicum Bitter, 1912 |
| Solanum longipedicellatum Bitter, 1912 |
| Solanum longipedicellatum var. longimucronatum Hawkes, 1944 |
| Solanum longipedicellatum var. pseudoprophyllum Bitter, 1912 |
| Solanum longistylum Correll, 1952 |
| Solanum lucidum M. Martens & Galeotti, 1845 |
| Solanum luteo-virescens Dunal, 1852 |
| Solanum macrantherum Dunal, 1816 |
| Solanum macranthum Dunal, 1814 |
| Solanum macropilosum Correll, 1961 |
| Solanum macroscolum Fernald, 1900 |
| Solanum madrense Fernald, 1900 |