| Encyclia x tixtlensis León-Peralta, Salmerón-Barrera & Pérez-García, 2023 |
| Encyclia xipheres (Rchb. f.) Schltr., 1914 |
| Epicladium Small, 1913 |
| Epicladium boothianum (Lindl.) Small, 1913 |
| Epidanthus L.O. Williams, 1940 |
| Epidanthus paranthicus (Rchb. f.) L.O. Williams, 1940 |
| Epidendreae Kunth, 1815 |
| Epidendroideae Lindl., 1826 |
| Epidendrum L., 1763 |
| Epidendrum abbreviatum Schltr., 1906 |
| Epidendrum aberrans Schltr., 1918 |
| Epidendrum acuminatum Sessé & Moc., 1894 |
| Epidendrum acunae Dressler, 1959 |
| Epidendrum adenocarpon Lex., 1825 |
| Epidendrum adenocarpon var. rosei Ames, F.T. Hubb. & C. Schweinf., 1935 |
| Epidendrum adenocaulum Lex., 1825 |
| Epidendrum affine Rchb. f., 1856 |
| Epidendrum alabastrialatum G.E. Pollard ex Hágsater, 1978 |
| Epidendrum alanjense Ames, 1922 |
| Epidendrum alatum Bateman, 1840 |