| Syrmatium tomentosum (Hook. & Arn.) Vogel, 1835 |
| Syrmatium watsonii (Vasey & Rose) Brand, 1898 |
| Tamarindus L., 1753 |
| Tamarindus indica L., 1753 |
| Tara Molina, 1810 |
| Tara cacalaco (Bonpl.) Molinari & Sánchez Och., 2016 |
| Tara vesicaria (L.) Molinari, Sánchez Och. & Mayta, 2016 |
| Tauroceras Britton & Rose, 1928 |
| Tauroceras cornigerum (L.) Britton & Rose, 1928 |
| Tephrosia Pers., 1807 |
| Tephrosia abbottiae C.E. Wood, 1949 |
| Tephrosia adunca Benth., 1839 |
| Tephrosia affinis S. Watson, 1886 |
| Tephrosia albida Brandegee, 1924 |
| Tephrosia arcuata (Rydb.) Standl., 1929 |
| Tephrosia belizensis Lundell, 1937 |
| Tephrosia brevipes Benth., 1839 |
| Tephrosia cana Brandegee, 1891 |
| Tephrosia candida DC., 1825 |
| Tephrosia caribaea (Jacq.) DC., 1825 |