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PRE — Plant Risk Evaluator

Petasites japonicus (Siebold & Zucc.) Maxim.

Common Name(s)
Japanese sweet coltsfoot, butterbur
Synonym(s)
Petasites japonicus (Siebold & Zucc.) Maxim. subsp. japonicus , Petasites japonicus subsp. giganteus (F. Schmidt ex Trautv.) Kitam., Petasites japonicus var. japonicus, Petasites japonicus var. giganteus F.Schmidt ex Makino

Is this plant a cultivar?  No

Life History:  Perennial

Growth Form:  forb

Japan, Korea, China

Rhizomatous perennial noted for its huge basal leaves that form dense spreading clumps of foliage to 3’ tall and 5’ wide.Typically found growing on wet streambanks in woodland areas. Long-stalked, lightly toothed, kidney-shaped, green leaves (to 16-32” wide) are tomentose beneath. Fragrant, yellowish-white, daisy-like flowers in dense corymbs appear in spring before the leaves emerge on rigid scapes to 6” tall (Missouri Botanical Garden.

External Resources
GBIF Species Page
USDA Plants Database page
US National Germplasm Database
Missouri Botanical Garden plant finder
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