Genus
Petasites (Butterburs)
Petasites frigidus palmatus. Photo: (c) drew_eich, some rights reserved (CC BY-NC)
Petasites is a genus of flowering plants in the sunflower family, Asteraceae, that are commonly referred to as butterburs and coltsfoots. They are perennial plants with thick, creeping underground rhizomes and large rhubarb-like leaves during the growing season.
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