| Hedyotis caerulea | Houstonia caerulea L. |
| Hedyotis calycosa | Houstonia calycosa A.Gray |
| Hedyotis cervantesii | Houstonia wrightii A.Gray |
| Hedyotis chlorophylla | Agathisanthemum chlorophyllum (Hochst.) Bremek. |
| Hedyotis gentianoides | Houstonia caerulea L. |
| Hedyotis lanceolata | Houstonia calycosa A.Gray |
| Hedyotis longifolia | Houstonia longifolia Gaertn. |
| Hedyotis michauxii | Houstonia serpyllifolia Michx. |
| Hedyotis nuttaliana | Houstonia tenuifolia Nutt. |
| Hedyotis pumila | Houstonia wrightii A.Gray |
| Hedyotis purpurea | Houstonia purpurea L. |
| Hedyotis pygmaea | Houstonia wrightii A.Gray |
| Hedyotis repens | Leptostigma arnottianum Walp. |
| Hedyotis rubra | Houstonia rubra Cav. |
| Hedyotis serpyllifolia | Houstonia serpyllifolia Michx. |
| Hedyotis umbellata | Houstonia purpurea L. |