| Strombocarpa reptans (Benth.) A. Gray, 1854 |
| Strongylodon Vogel, 1836 |
| Strongylodon macrobotrys A. Gray, 1854 |
| Strophostyles Elliott, 1823 |
| Strophostyles helvola (L.) Elliott, 1823 |
| Strophostyles leiosperma (Torr. & A. Gray) Piper, 1926 |
| Strophostyles umbellata (Willd.) Britton, 1897 |
| Stylosanthes Sw., 1788 |
| Stylosanthes bangii Taub., 1895 |
| Stylosanthes calcicola Small, 1933 |
| Stylosanthes dissitiflora B.L. Rob. & Seaton, 1893 |
| Stylosanthes eciliata S.F. Blake, 1924 |
| Stylosanthes glutinosa Kunth, 1824 |
| Stylosanthes gracilis Kunth, 1824 |
| Stylosanthes gracilis var. subviscosa (Benth.) Burkart, 1939 |
| Stylosanthes gracilis var. vulgaris Burkart, 1939 |
| Stylosanthes guianensis (Aubl.) Sw., 1789 |
| Stylosanthes guianensis f. viscosissima Hassl., 1919 |
| Stylosanthes guianensis subsp. anomala Hassl., 1919 |
| Stylosanthes guianensis subsp. dissitiflora (Robinson & Seaton) Mohlenbr., 1958 |