Arctic butterbur

English thumb|an Arctic butterbur, Petasites frigidus species var. palmatus Noun A flowering plant native to North America, Petasites frigidus species; en sweet coltsfoot. en 2013 Zoë Gardner; Michael McGuffin American Herbal Products Association’s Botanical Safety Handbook http://www.worldcat.org/title/american-herbal-products-associations-botanical-safety-handbook/oclc/892201646 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. en Senecioneae tribe plants