| Scoliaxon mexicanus (S. Watson) Payson, 1924 |
| Scoliaxoneae Al-Shehbaz & Warwick, 2011 |
| Selenia Nutt., 1825 |
| Selenia dissecta Torr. & A. Gray, 1855 |
| Selenia mexicana Standl., 1937 |
| Senckenbergia P. Gaertn., B. Mey. & Scherb., 1800 |
| Senebiera DC., 1799 |
| Senebiera didyma (L.) Pers., 1807 |
| Senebiera heleniana DC., 1821 |
| Senebiera pinnatifida DC., 1799 |
| Shortia Raf., 1840 |
| Sibara Greene, 1896 |
| Sibara angelorum (S. Watson) Greene, 1896 |
| Sibara brandegeana (Rose) Greene, 1896 |
| Sibara davidsonii Al-Shehbaz, 2010 |
| Sibara laxa (S. Watson) Greene, 1896 |
| Sibara palmeri (S. Watson) Greene, 1896 |
| Sibara pectinata (Greene) Greene, 1896 |
| Sibara runcinata (S. Watson) Rollins, 1941 |
| Sibara runcinata var. brachycarpa Rollins, 1947 |