| Asteraceae | |
Tetragonotheca guatemalensis
| J.M. Coult. | Bot. Gaz. 16(4): 99 | 1891 |
| Asteraceae | |
Tetragonotheca helianthoides
| L. | Sp. Pl. 2: 903 | 1753 |
| Asteraceae | |
Tetragonotheca ludoviciana
| (Torr. & A. Gray) A. Gray ex E. Hall | Pl. Tex. 13 | 1873 |
| Asteraceae | |
Tetragonotheca parviflora
| Jacq. | Enum. Syst. Pl. 28 | 1760 |
| Asteraceae | |
Tetragonotheca repanda
| (Buckley) Small | Fl. S.E. U.S. 1250, 1340 | 1903 |
| Asteraceae | |
Tetragonotheca texana
| A. Gray & Engelm. | Proc. Amer. Acad. Arts 1: 48 | 1846 [1847] |