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CCDB → Angiosperms → Betulaceae → Alnus → Alnus × spaethii
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Alnus × spaethii | Alnus × spaethii Callier | 56 | Darlington, 1955 | Woodworth 1931 |