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CCDB → Angiosperms → Papaveraceae → Hylomecon
| Taxon name | Status | Median (n) |
| Hylomecon japonica (Thunb.) Prantl & Kündig | Accepted | 12 |
| Hylomecon vernalis Maxim. | Accepted | 12 |
| Hylomecon hylomeconoides (Nakai) Y. N. Lee | Unresolved | 6 |
| Hylomecon japonicum Prantl | Unresolved | 6 |