| Piper arboreum Aubl., 1775 |
| Piper arboreum subsp. arboreum Aubl., 1775 |
| Piper arborioccupans Trel. ex Callejas, 2020 |
| Piper arieianum C. DC., 1897 |
| Piper aristolochiaefolium (Trel.) Yunck., 1950 |
| Piper arthantopse C. DC., 1866 |
| Piper augustum Rudge, 1805 |
| Piper auritum Kunth, 1816 |
| Piper austromexicanum Trel., 1926 |
| Piper berlandieri C. DC., 1869 |
| Piper bernoullii Callejas, 2020 |
| Piper berteroanum C. DC., 1869 |
| Piper biolleyi C. DC., 1892 |
| Piper bisasperatum Trel., 1929 |
| Piper biseriatum C. DC., 1920 |
| Piper blandum Jacq., 1791 |
| Piper botterii C. DC., 1920 |
| Piper bourgeaui C. DC., 1872 |
| Piper brachypus Trel., 1921 |
| Piper bredemeyeri J. Jacq., 1816 |