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CCDB → Angiosperms → Betulaceae → Ostrya
| Taxon name | Status | Median (n) |
| Ostrya carpinifolia Scop. | Accepted | 8 |
| Ostrya japonica Sarg. | Accepted | 8 |
| Ostrya rehderiana Chun | Accepted | 8 |
| Ostrya virginiana (Mill.) K. Koch | Accepted | 8 |