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CCDB → Pteridophytes → Pteridaceae → Onychium
| Taxon name | Status | Median (n) |
| Onychium japonicum (Thunb.) Kunze | Accepted | 58 |
| Onychium moupinense Ching | Accepted | 87 |
| Onychium plumosum Ching | Accepted | 58 |
| Onychium siliculosum (Desv.) C. Chr. | Accepted | 29 |
| Onychium tenuifrons Ching | Accepted | None |
| Onychium contiguum C. Hope | Unresolved | 29 |
| Onychium cryptogrammoides Christ | Unresolved | 58 |
| Onychium fragile S. Verma & Khullar | Unresolved | 87 |
| Onychium nitidula Bak. | Unresolved | 58 |
| Onychium japonicum Blume | Synonym of Dendrobium moniliforme (L.) Sw. | 58 |
| Onychium japonicum Kunze | Synonym of Onychium japonicum (Thunb.) Kunze | 58 |
| Onychium lucidum (D. Don) Spreng. | Synonym of Onychium japonicum var. lucidum (D. Don) Christ | 58 |
| Onychium ipii Ching | Synonym of Onychium moupinense var. ipii (Ching) K. H. Shing | 87 |
| Onychium auratum Kaulf. | Synonym of Onychium siliculosum (Desv.) C. Chr. | 29 |
| Onychium chrysocarpus (Hook. & Grev.) C. Chr. | Synonym of Onychium siliculosum (Desv.) C. Chr. | 29 |