Arctic butterbur

English

an Arctic butterbur, Petasites frigidus var. palmatus

Noun

Arctic butterbur (plural Arctic butterburs)

1. A flowering plant native to North America, Petasites frigidus; sweet coltsfoot.
   • 2013, Zoë Gardner, Michael McGuffin, American Herbal Products Association’s Botanical Safety Handbook‎^[1], page 964:

     Note that although medicinal species of Petasites, including purple butterbur (Petasites hybridus) and Arctic butterbur (Petasites frigidus), are not listed in this text, these species also contain pyrrolizidine alkaloids.