| Satyrium orchioides Sw., 1788 |
| Satyrium spirale Sw., 1788 |
| Sauroglossum Lindl., 1833 |
| Sauroglossum cranichoides (Griseb.) Ames, 1904 |
| Sauroglossum nigricans Schltr., 1918 |
| Scaphosepalum Pfitzer, 1888 |
| Scaphosepalum microdactylum Rolfe, 1893 |
| Scaphosepalum standleyi Ames, 1925 |
| Scaphyglottis Poepp. & Endl., 1836 |
| Scaphyglottis behrii (Rchb. f.) Benth. & Hook. f. ex Hemsl., 1883 |
| Scaphyglottis bergeriana (Schltr.) L.O. Williams, 1950 |
| Scaphyglottis confusa (Schltr.) Ames & Correll, 1942 |
| Scaphyglottis crurigera (Bateman ex Lindl.) Ames & Correll, 1942 |
| Scaphyglottis cuneata Schltr., 1918 |
| Scaphyglottis cuneata var. major (C. Schweinf.) C. Schweinf., 1947 |
| Scaphyglottis dubia (A. Rich. & Galeotti) Hemsl., 1883 |
| Scaphyglottis fasciculata Hook., 1841 |
| Scaphyglottis gemma (Rchb. f.) L.O. Williams, 1956 |
| Scaphyglottis graminifolia (Ruiz & Pav.) Poepp. & Endl., 1836 |
| Scaphyglottis hondurensis (Ames) L.O. Williams, 1950 |