Butterbur

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{{Taxobox | color = lightgreen | name = Butterbur | image = Butterbur.jpg | image_width = 240px | image_caption = Petasites hybridus | regnum = Plantae | divisio = Magnoliophyta | classis = Magnoliopsida | ordo = Asterales | familia = Asteraceae | tribus = Senecioneae | genus = Petasites | subdivision_ranks = species | subdivision = About 15-20 species; see text }}

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.

The short spikes of flowers are produced just before these leaves in Spring, emerging with only a few elongated basal bracts and are usually green, flesh coloured or dull white depending on species.

Petasites is very closely related to the genus Tussilago (Coltsfoot), and also related to the huge genus Senecio.