[Members of the Sunflower Family with Discoid Flower Heads Found West of the Cascade Mountains]
Butterburs and Coltsfoots West of the Cascade Mountains of Oregon and Washington

The Genus Petasites

 

 

Winter Heliotrope: Petasites fragrans -

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

Sweet Coltsfoot, Western Coltsfoot, Alpine Butterbur, Arctic Butterbur: Petasites frigidus var. palmatus (Synonyms: Petasites palmatus, Petasites speciosus) -

Japanese Sweet Coltsfoot: Petasites japonicus var. japonicus (Synonym: Petasites hybridus) -

Paul Slichter E-mail