| Tabebuia argentea | Tabebuia caraiba |
| Tabebuia chrysotricha | Tecoma chrysotricha |
| Tabebuia impetiginosa | Tabebuia avellandae |
| Tabebuia pallida | Bignonia pallida |
| Tabebuia riparia | Tabebuia leucoxylon, Bignonia leucoxylon |
| Tabernaemontana divaricata | Tabernaemontana coronaria, Ervatamia coronaria |
| Tabernaemontana elegans | Conopharyngia elegans, Leptopharyngia elegans |
| Tabernaemontana pandacaqui | Tabernaemontana orientalis, Ervatamia angustisepala |
| Tacca chantrieri | Tacca lancifolia, Tacca macrantha, Tacca roxburghii |
| Tacca chantrieri | Tacca minor, Tacca paxiana, Tacca esquirolii, Schizocapsa itagakii |
| Tecoma argentea | Tabebuia argentea |
| Tecoma capensis | Tecomaria capensis |
| Tecoma stans | Stenolobium stans |
| Templetonia retusa | Rafnia retusa |
| Tetradenia riparia | Iboza riparia |
| Tetrapanax papyrifera | Fatsia papyrifera, Aralia papyrifera |
| Thalia dealbata | Thalia barbata |
| Thevetia ahouai | Cerbera ahouai, Cerbera nitida, Thevetia nitida |
| Thevetia peruviana | Cerbera peruviana, Cascabela peruviana, Cascabela neriifolia, Cascabela thevetia, Thevetia neriifolia |
| Thevetia thevetioides | Cerbera thevetioides |
| Thunbergia fragrans | Thunbergia volubilis, Flemingia grandiflora |
| Tibouchina urvilleana | Tibouchina semidecandra |
| Tipuana tipu | Tipuana speciosa, Machaerium tipu |
| Tithonia diversifolia | Mirasolia diversifolia |
| Toona sinensis | Cedrela sinensis |
| Tribulus cistoides | Tribulus terrestris |
| Triphasia trifoliata | Triphasia aurantifolia, Limonia trifolia, Limonia trifoliata |
| Triplaris surinamensis | Triplaris weigeltiana |
| Tristania conferta | Lophostemon confertus |
| Turbina oblongata | Ipomoea oblongata, Ipomoea randii, Ipomoea lambtoniana |
| Turraea obtusifolia | Turraea mombassana |
| Tylecodon cacalioides | Cotyledon cacalioides |
| Tylecodon hallii | Cotyledon hallii |
| Tylecodon leucothrix | Adromischus leucothrix |
| Tylecodon paniculatus | Cotyledon paniculata, Cotyledon fascicularis, Cotyledon tardiflora, Cotyledon mollis |
| Tylecodon pearsonii | Cotyledon pearsonii, Cotyledon woodii, Tylecodon luteasquamatum |
| Tylecodon reticulatus | Cotyledon reticulata, Tylecodon reticulata |
| Tylecodon schaeferanus | Cotyledon schaeferana, Tylecodon shaefferianus, Cotyledon sinus-alexandri, Cotyledon woodii, Tylecodon decipiens |
| Tylecodon singularis | Cotyledon singularis |
| Tylecodon wallichii | Cotyledon wallichii |