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CCDB → Angiosperms → Rubiaceae → Diodia
| Taxon name | Status | Median (n) |
| Diodia virginiana L. | Accepted | 14 |
| Diodia maritima Thonn. | Synonym of Diodella serrulata (P. Beauv.) Borhidi | 14 |
| Diodia teres Walter | Synonym of Diodella teres (Walter) Small | 14 |
| Diodia natalensis (Hochst.) J. G. García | Synonym of Spermacoce natalensis Hochst. | 14 |