1) Asterid dicot genus 2) Genus petasites 
The plants commonly referred to as Butterbur are found in the daisy family Asteraceae in the genus Petasites. They are mostly quite robust plants with thick, creeping underground rhizomes and large Rhubarb-like leaves during the growing season. Another common name for many species of this genus is Sweet Coltsfoot. ==Characteristics== The short spi...
Petasites is a genus of hardy herbaceous plants, generally with woolly leaves and stems, belonging to the family Compositae. They bear usually white or purple flower-heads.
[n] - genus of rhizomatous herbs of north temperate regions: butterbur
genus Petasites noun genus of rhizomatous herbs of north temperate regions: butterbur; sweet coltsfoot