| Solanum pedunculare Schltdl., 1847 |
| Solanum pennellii Correll, 1958 |
| Solanum physalifolium Rusby, 1896 |
| Solanum piliferum Benth., 1840 |
| Solanum pilosissimum M. Martens & Galeotti, 1845 |
| Solanum pilosiusculum M. Martens & Galeotti, 1845 |
| Solanum platanifolium Hook., 1826 |
| Solanum plumense Fernald, 1900 |
| Solanum plurifurcipilum Bitter, 1912 |
| Solanum polygamum Boiss. ex Dunal, 1852 |
| Solanum polytrichon Rydb., 1924 |
| Solanum porphyranthum Dunal, 1852 |
| Solanum pringlei B.L. Rob. & Greenm., 1895 |
| Solanum profundeincisum Bitter, 1913 |
| Solanum pruinosum Dunal, 1852 |
| Solanum pterocladum Van Heurck & Müll. Arg., 1884 |
| Solanum ptychanthum Dunal, 1852 |
| Solanum purpusii Brandegee, 1914 |
| Solanum purulense Donn. Sm., 1911 |
| Solanum quadriflorum M. Martens & Galeotti, 1845 |