| Robinia variegata Schltdl., 1838 |
| Robinia violacea Mill., 1768 |
| Robinieae Hutch., 1964 |
| Robrichia (Barneby & J.W. Grimes) A.R.M. Luz & E.R. Souza, 2022 |
| Robrichia schomburgkii (Benth.) A.R.M. Luz & E.R. Souza, 2022 |
| Rudua F. Maek., 1955 |
| Rupertia J.W. Grimes, 1990 |
| Rupertia rigida (Parish) J.W. Grimes, 1990 |
| Russellodendron Britton & Rose, 1930 |
| Russellodendron cacalaco (Bonpl.) Britton & Rose, 1930 |
| Sagitticarpi A.E. Estrada, Villarreal & Encina, 2020 |
| Samanea (Benth.) Merr., 1916 |
| Samanea leucocalyx Britton & Rose,1928 |
| Samanea saman (Jacq.) Merr., 1916 |
| Samanea schaffneri (S. Watson) J.F. Macbr., 1919 |
| Schizolobium Vogel, 1837 |
| Schizolobium covilleanum Pittier, 1917 |
| Schizolobium excelsum Vogel, 1837 |
| Schizolobium glutinosum Tul., 1846 |
| Schizolobium kellermanii Pittier, 1917 |