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CCDB → Angiosperms → Rosaceae → Crataegus → Crataegus grandis Ashe
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Crataegus grandis Ashe | Crataegus grandis Ashe | 51 | IPCN online | Dickinson, T. & J. Phipps. 1986. Studies in Crataegus (Rosaceae: Maloideae) XIV. The breeding system of Crataegus crus-galli sensu lato in Ontario. Amer. J. Bot. 73: 116–130. |