| Stelis poasensis (Ames) Karremans & Chinchilla, 2019 |
| Stelis praesecta Schltr., 1923 |
| Stelis propinqua Ames, 1923 |
| Stelis punctulata (Rchb. f.) Soto Arenas, 2003 |
| Stelis purpurascens A. Rich. & Galeotti, 1845 |
| Stelis purpusii Schltr., 1918 |
| Stelis quadrifida (Lex.) Solano & Soto Arenas, 2003 |
| Stelis resupinata (Ames) Pridgeon & M.W. Chase, 2001 |
| Stelis retusa (Lex.) Pridgeon & M.W. Chase, 2001 |
| Stelis rubens Schltr., 1910 |
| Stelis rubens var. oxypetala (Schltr.) Ames, 1934 |
| Stelis rufobrunnea (Lindl.) L.O. Williams, 1939 |
| Stelis salazarii Solano, 2000 |
| Stelis sanguinolenta (Garay & W. Kittr.) Solano, 2011 |
| Stelis scariosa (Lex.) Karremans, 2014 |
| Stelis segoviensis (Rchb. f.) Pridgeon & M.W. Chase, 2001 |
| Stelis seleniglossa Schltr., 1923 |
| Stelis soconuscana Solano, 2011 |
| Stelis sotoana Solano, 1993 |
| Stelis sotoarenasii Solano, 2010 |