Petasites frigidus subsp. palmatus (Aiton) Cody
Publ. & Syn.Cody, Canad. Field-Naturalist 108: 94 (1994). - Tussilago palmata Aiton, Hort. Kew. 3: 188 (1789). Holotype (BM-000201): Canada: Newfoundland, "Croque Nfld", 1766, leg. Banks. - Nardosmia palmata (Aiton) Hook., Fl. Bor.-Amer. 1: 308 (1833). - Petasites palmatus (Aiton) A. Gray, Bot. California 1: 407 (1876). - Petasites frigidus var. palmatus (Aiton) Cronquist, Rhodora 48: 124 (1946).
NotesReports of subsp. palmatus from northeastern Asia must be critically evaluated, especially as the morphologically similar and phytogeographically much more probable subsp. nivalis has not been acknowledged by most Russian botanists. Barkalov (1992) did not accept subsp. palmatus from the Russian Far East but rather assigned the plants with deep-lobed leaves to the eastern Asian P. tatewakianus Kitam.
Chromosomes60 (6x). - Canada, U.S.A.? - At least five reports.
Not included: A report of 2n = ca. 60 (6x) from the Primorsk area (Sokolovskaya 1966). This report is from a part range of this race reported from the Russian Far East. We suspect that it may be referable to subsp. nivalis or to another, Asian species (see below).
GeographyNorth American (N): CAN.
Distribution N = F     E = S     HL = s     [ key ]
Parent taxonPetasites frigidus (L.) Fr.
PAF ID862403c
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Panarctic Flora Editor-in-Chief: Reidar Elven (Natural History Museum, University of Oslo)
Editorial Committee: Reidar Elven, David F. Murray (Museum of the North, University of Alaska), Volodya Yu. Razzhivin (Komarov Botanical Institute, Russian Academy of Sciences), Boris A. Yurtsev [deceased] (Komarov Botanical Institute, Russian Academy of Sciences)