| 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 |