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CCDB → Angiosperms → Compositae → Petasites → Petasites palmatus (Aiton) A. Gray
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| ! | Petasites palmatus (Aiton) A. Gray | Petasites frigidus var. palmatus (Aiton) Cronquist | c.60 | IPCN65 | Sorensen & C. 1964 | ||
| Petasites palmatus (Aiton) A. Gray | Petasites frigidus var. palmatus (Aiton) Cronquist | 60 | IPCN online | Morton, J. K. 1981. Chromosome numbers in Compositae from Canada and the U.S.A. Bot. J. Linn. Soc. 82: 357–368. | |||
| ! | Petasites palmatus (Aiton) A. Gray | Petasites frigidus var. palmatus (Aiton) Cronquist | 60 | Fedorov, 1974 | Sorensen, Christiansen 1964 |