| Piper fraguanum Trel., 1929 |
| Piper friedrichsthalii C. DC., 1869 |
| Piper galeottianum M. Martens & Galeotti, 1843 |
| Piper garagaranum C. DC., 1920 |
| Piper gaumeri Trel., 1929 |
| Piper geniculatum Link, 1820 |
| Piper gibbosum C. DC., 1892 |
| Piper glabellum Sw., 1788 |
| Piper glabrescens (Miq.) C. DC., 1869 |
| Piper glaucescens Jacq., 1815 |
| Piper grandilimbum C. DC., 1920 |
| Piper guayranum C. DC., 1890 |
| Piper guazacapanense Trel. & Standl., 1952 |
| Piper heydei C. DC., 1894 |
| Piper hirsutum Sw., 1797 |
| Piper hispidulum Sw., 1788 |
| Piper hispidum Sw., 1788 |
| Piper holdridgeanum W.C. Burger, 1971 |
| Piper humile Vahl, 1805 |
| Piper indignum Trel., 1929 |