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. Most species are native to Asia or southern Europe.
The short spikes of flowers are produced just before the leaves in late winter (e.g. Petasites fragrans) or spring, emerging with only a few elongated basal bracts and are usually green, ...Read more in Wikipedia
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