| Schizolobium parahyba (Vell.) S.F. Blake, 1919 |
| Schnella Raddi, 1820 |
| Schnella glabra (Jacq.) Dugand, 1941 |
| Schnella guianensis (Aubl.) Wunderlin, 2010 |
| Schnella herrerae Britton & Rose, 1930 |
| Schnella microstachya Raddi, 1820 |
| Schrammia Britton & Rose, 1930 |
| Schrammia caudata (A. Gray) Britton & Rose, 1930 |
| Schrankia Willd., 1806 |
| Schrankia brachycarpa Benth., 1840 |
| Schrankia confusa (Britton & Rose) Standl., 1930 |
| Schrankia heterocarpa Standl., 1940 |
| Schrankia latidens (Small) K. Schum., 1903 |
| Schrankia subinermis S. Watson, 1882 |
| Sciacassia Britton, 1930 |
| Sciacassia siamea (Lam.) Britton ex Britton & Rose, 1930 |
| Scytalis E. Mey., 1835 |
| Securigera DC., 1805 |
| Securigera varia (L.) Lassen, 1989 |
| Selerothamnus Harms, 1921 |