Checklist » Asteraceae » Petasites japonicus var. giganteus
Last updated 11/26/2008 by David Giblin.
Petasites japonicus (Siebold & Zucc.) Maxim. var. giganteus (F. Schmidt ex Trautv.) G. Nicholson[HC2]
Japanese sweet coltsfoot

Origin: Introduced from Japan, Sakhalin, and Kuril Islands

selected vouchers: WTU

Notes: A large perennial herb persisting and slightly spreading at a long abandoned homestead, now forested, in Skagit Co. "NoCa" = National Park Service herbarium for North Cascades National Park, in Marblemount.


» Naas, D., R. Naas, and E. Burnett. 1990. A checklist of vascular plants of the North Cascades, Washington. North Cascades National Park, Sedro Woolley, WA. 57 p.
» Ohwi, J. 1984. Flora of Japan (in English). Smithsonian Institution, Washington, D.C.
» Toman, J. 1972. A taxonomic survey of the genera Petasites and Endocellion. Folia Geobot. Phytotaxon. 7: 381-406.
Synonyms & Misapplied Names:
Petasites japonicus (Siebold & Zucc.) Maxim. ssp. giganteus (F. Schmidt ex Trautv.) Kitam.