[Members of the Sunflower Family with Discoid Flower Heads in the Cascade Mts. or Oregon and Washington]

Butterburs and Coltsfoots in the Cascade Mountains of Oregon and Washington

The Genus Petasites

Leaf of Alpine Butterbur, Arctic Butterbur, Sweet Coltsfoot: Petasites frigidus var. frigidus (Synonym: Petasites frigidus var. nivalis)

Arctic Butterburr: Petasites frigidus var. frigidus

Alpine Butterbur, Arctic Butterbur, Sweet Coltsfoot: Petasites frigidus var. frigidus (Synonym: Petasites frigidus var. nivalis) -

Arctic Coltsfoot, Sweet Coltsfoot, Western Coltsfoot: Petasites frigidus var. palmatus (Synonyms: Nardosmia palmata, Petasites arcticus, Petasites frigidus ssp. arcticus, Petasites palmatus, Petasites palmatus ssp. speciosus, Petasites speciosus, Tussilago palmata) -

Hybrid Coltsfoot, Wenatchee Coltsfoot: Petasites xvitifolius (Synonyms: Petasites nivalis ssp. vitifolius, Petasites trigonophyllus, Petasites xvitifolius, Petasites warrenii) -

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