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CCDB → Angiosperms → Rosaceae → Crataegus → Crataegus nigra Waldst. & Kit.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Crataegus nigra Waldst. & Kit. | Crataegus nigra Waldst. & Kit. | 34 | IPCN75-78 | Byatt & Murray 1977 |