| Peperomia johnstonii Trel., 1940 |
| Peperomia koepperi Trel., 1940 |
| Peperomia laevis C. DC., 1866 |
| Peperomia lanceolatopeltata C. DC., 1866 |
| Peperomia lancifolia Hook., 1841 |
| Peperomia langlassei C. DC., 1920 |
| Peperomia langsdorffii (Miq.) Miq., 1843 |
| Peperomia laudabilis Trel., 1937 |
| Peperomia lenticularis D. Parodi, 1878 |
| Peperomia leptophylla Miq., 1845 |
| Peperomia liebmannii C. DC., 1872 |
| Peperomia lignescens C. DC., 1866 |
| Peperomia limana Trel. & Standl., 1952 |
| Peperomia lindeniana Miq., 1868 |
| Peperomia lindleyana Miq., 1843 |
| Peperomia longeacuminata Trel. ex Standl., 1931 |
| Peperomia lundellii Trel., 1936 |
| Peperomia luxii C. DC., 1894 |
| Peperomia macrandra C. DC., 1898 |
| Peperomia macrophylla C. DC., 1894 |