Checklist » Asteraceae » Petasites frigidus var. palmatus
Last updated 5/3/2010 by David Giblin.
Petasites frigidus (L.) Fr. var. palmatus (Aiton) Cronquist[FNA20, HC, HC2]
western coltsfoot

Publication: Rhodora. 48: 124. 1946.

Origin: Native

selected vouchers: WTU

Notes: Vestigial hybrids with P. sagittatus are found in Kittitas Co. (Bogle 1961, 1968).

References:

» Bogle, A. L. 1961. A study of the genus Petasites in the Pacific Northwest, with special reference to Petasites warrenii St. John. Unpublished M.S. thesis, University of Washington, Seattle.
» Bogle, A. L. 1968. Evidence for the hybrid origin of Petasites warrenii and P. vitifolius. Rhodora 70: 533-551.
Synonyms & Misapplied Names:
Nardosmia palmata (Aiton) Hook.
Petasites arcticus A.E. Porsild
Petasites frigidus (L.) Fr. ssp. arcticus (A.E. Porsild) Cody
Petasites palmatus (Aiton) A. Gray
Petasites palmatus (Aiton) A. Gray ssp. speciosus (Nutt.) Toman
Petasites speciosus (Nutt.) Piper
Tussilago palmata Aiton