| Encyclia obpiribulbon Hágsater, 1982 |
| Encyclia ochracea (Lindl.) Dressler, 1961 |
| Encyclia oestlundii (Ames, F.T. Hubb. & C. Schweinf.) Hágsater & Stermitz, 1983 |
| Encyclia oncidioides (Lindl.) Schltr., 1914 |
| Encyclia oncidioides var. gravida (Lindl.) Hoehne, 1952 |
| Encyclia oncidioides var. ramonensis (Rchb. f.) Hoehne, 1952 |
| Encyclia ovulum (Lindl.) Schltr., 1918 |
| Encyclia panthera (Rchb. f.) Schltr., 1918 |
| Encyclia papillosa (Bateman) Aguirre-Olav., 1987 |
| Encyclia parviflora (Regel) Withner, 1998 |
| Encyclia pastoris (Lex.) Schltr., 1918 |
| Encyclia pentotis (Rchb. f.) Dressler, 1961 |
| Encyclia phymatoglossa (Rchb. f.) Schltr., 1918 |
| Encyclia pollardiana (Withner) Dressler & G.E. Pollard, 1971 |
| Encyclia polybulbon (Sw.) Dressler, 1961 |
| Encyclia powellii Schltr., 1922 |
| Encyclia pringlei (Rolfe) Schltr., 1918 |
| Encyclia pruinosa (A. Rich. & Galeotti) Schltr., 1918 |
| Encyclia pseudopygmaea (Finet) Dressler & G.E. Pollard, 1974 |
| Encyclia pterocarpa (Lindl.) Dressler, 1961 |