| Pleurothallis poasensis Ames, 1922 |
| Pleurothallis polyliria Endrés & Rchb. f., 1871 |
| Pleurothallis polystachya A. Rich. & Galeotti, 1845 |
| Pleurothallis pringlei Schltr., 1906 |
| Pleurothallis prorepens (Rchb. f.) Ames, 1934 |
| Pleurothallis puberula Klotzsch, 1854 |
| Pleurothallis pubescens Lindl., 1836 |
| Pleurothallis purpusii Schltr., 1915 |
| Pleurothallis racemiflora Lindl., 1825 |
| Pleurothallis ramentacea Garay & Dunst., 1976 |
| Pleurothallis repens Ames, 1908 |
| Pleurothallis resupinata Ames, 1908 |
| Pleurothallis retusa (Lex.) Lindl., 1842 |
| Pleurothallis rhynchoglossa Schltr., 1915 |
| Pleurothallis rufa Rolfe, 1898 |
| Pleurothallis rufescens (Rolfe) Schltr., 1921 |
| Pleurothallis rufobrunnea Lindl., 1859 |
| Pleurothallis saccatilabia C. Schweinf., 1940 |
| Pleurothallis samacensis Ames, 1923 |
| Pleurothallis sanchoi Ames, 1923 |