| Spiranthes pseudogoodyeroides L.O. Williams, 1946 |
| Spiranthes pseudopyramidalis L.O. Williams, 1946 |
| Spiranthes pubens A. Rich. & Galeotti, 1845 |
| Spiranthes pubicaulis L.O. Williams, 1946 |
| Spiranthes pulchra Schltr., 1918 |
| Spiranthes pyramidalis Lindl., 1840 |
| Spiranthes ramentacea Lindl., 1840 |
| Spiranthes rhombilabia (Garay) McVaugh, 1985 |
| Spiranthes richardiana Schltr., 1918 |
| Spiranthes romanzoffiana Cham., 1828 |
| Spiranthes rosulata Lindl., 1843 |
| Spiranthes rubrocallosa B.L. Rob. & Greenm., 1895 |
| Spiranthes saccata A. Rich. & Galeotti, 1845 |
| Spiranthes saltensis Ames, 1908 |
| Spiranthes sarcoglossa A. Rich. & Galeotti, 1845 |
| Spiranthes sawyeri Standl. & L.O. Williams, 1953 |
| Spiranthes sceptrodes Rchb. f., 1855 |
| Spiranthes schaffneri Rchb. f., 1857 |
| Spiranthes seminuda Schltr., 1906 |
| Spiranthes spanantha McVaugh, 1985 |