| Pelexia maculata Rolfe, 1893 |
| Pelexia olivacea Rolfe, 1891 |
| Pelexia olivacea subsp. congesta (Ames & C. Schweinf.) Szlach., Mytnik & Rutk., 2003 |
| Pelexia pringlei Fernald, 1900 |
| Pelexia richardiana (Schltr.) Garay, 1982 |
| Pelexia roseoalba Rchb. f., 1854 |
| Pelexia saccata Rolfe, 1895 |
| Pelexia schaffneri (Rchb. f.) Schltr., 1920 |
| Pelexia scintillans E.W. Greenw., 1990 |
| Pelexia spiranthoides Lindl., 1826 |
| Pelexia stenorrhynchoides Griseb., 1866 |
| Pelexia subaequalis Ames, 1923 |
| Pelexia tomentosa (Vell.) Schltr., 1920 |
| Pelexia weirii (Rchb. f.) Schltr., 1920 |
| Pelexia wendlandiana Kraenzl., 1892 |
| Peramium G. Salisb. ex J.M. Coult., 1894 |
| Peramium decipiens (Hook.) Piper, 1906 |
| Peramium giganteum (Douglas ex Hook.) J.M. Coult., 1894 |
| Peramium menziesii (Lindl.) Morong, 1894 |
| Peristeria Hook., 1831 |