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CCDB → Angiosperms → Plantaginaceae → Mecardonia
| Taxon name | Status | Median (n) |
| Mecardonia acuminata (Walter) Small | Accepted | 21 |
| Mecardonia procumbens (Mill.) Small | Accepted | 11 |
| Bacopa chamaedryoides (Kunth) Wettst. | Synonym of Mecardonia procumbens (Mill.) Small | 11 |
| Herpestis chamaedryoides Kunth | Synonym of Mecardonia procumbens (Mill.) Small | 11 |
| Mecardonia dianthera (Sw.) Pennell | Synonym of Mecardonia procumbens (Mill.) Small | 11 |