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CCDB → Angiosperms → Betulaceae → Betula → Betula papyrifera var. occidentalis (Hook.) Sarg.
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Betula papyrifera var. occidentalis (Hook.) Sarg. | Betula occidentalis Hook. | 84, c.160 | IPCN72 | VALANNE, T. 1972. Colchicine effects and colchicine-induced polyploidy in Betula. Ann. Acad. Sci. Fenn. Ser. A. 191: 1-28. |