| Sesbania grandiflora (L.) Pers., 1807 |
| Sesbania herbacea (Mill.) McVaugh, 1987 |
| Sesbania longifolia DC., 1825 |
| Sesbania macrocarpa Muhl. ex Raf., 1817 |
| Sesbania mexicana Pollard, 1897 |
| Sesbania sesban (L.) Merr., 1912 |
| Sesbania virgata (Cav.) Poir., 1806 |
| Sesbania virgata (Cav.) Pers., 1807 |
| Sigmoidotropis (Piper) A. Delgado, 2011 |
| Sigmoidotropis Piper, 1926 |
| Sigmoidotropis elegans (Piper) A. Delgado, 2011 |
| Sigmoidotropis grandiflora (Steud.) A. Delgado, 2011 |
| Sigmoidotropis speciosa (Kunth) A. Delgado, 2011 |
| Sophora L., 1753 |
| Sophora affinis Torr. & A. Gray, 1840 |
| Sophora arenicola Nees, 1821 |
| Sophora carnosa (Pursh) Yakovlev, 1967 |
| Sophora conzattii Standl., 1922 |
| Sophora gypsophila B.L. Turner & A.M. Powell, 1972 |
| Sophora havanensis Jacq., 1760 |