| Bignonia tiliifolia Kunth, 1819 |
| Bignonia tomentella S. Moore, 1895 |
| Bignonia triphylla Vell., 1825 |
| Bignonia tweediana Griseb. ex Fabris, 1965 |
| Bignonia umbellata DC., 1845 |
| Bignonia uncata Sims, 1812 |
| Bignonia uncinata G. Mey., 1818 |
| Bignonia unguis L. ex DC., 1845 |
| Bignonia unguis var. gracilis (Lodd.) DC., 1845 |
| Bignonia unguis-cati L., 1753 |
| Bignonia unguis-cati var. exoleta (Vell.) Sprague, 1905 |
| Bignonia unguis-cati var. guatemalensis K. Schum. & Loes., 1896 |
| Bignonia unguis-cati var. serrata Bureau & K. Schum., 1896 |
| Bignonia venusta Ker Gawl., 1818 |
| Bignonia verrucifera Schltdl., 1855 |
| Bignonia villosa Bertero ex Spreng., 1825 |
| Bignonia viminalis Kunth, 1819 |
| Bignoniaceae Juss., 1789 |
| Bignonieae Dumort., 1829 |
| Callichlamys Miq., 1844 |