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CCDB → Angiosperms → Onagraceae → Hauya
| Taxon name | Status | Median (n) |
| Hauya elegans DC. | Accepted | 30 |
| Hauya heydeana D. Sm. | Synonym of Hauya elegans subsp. cornuta (Hemsl.) P. H. Raven & Breedlove | 10 |
| Hauya ruacophila D. Sm. & Rose | Synonym of Hauya elegans subsp. cornuta (Hemsl.) P. H. Raven & Breedlove | 10 |