• WordNet 3.6
    • n Petasites genus of rhizomatous herbs of north temperate regions: butterbur; sweet coltsfoot
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Century Dictionary and Cyclopedia
    • n petasites A genus of composite plants of the tribe Senecionideæ and subtribe Tussilagineæ, characterized by scapes bearing many partly diœcious heads of flowers with involucral bracts in but one row. There are about 12 species, natives of Europe, Asia, and North America, white woolly herbs, from a perennial creeping rootstock, bearing large cordate or kidney-shaped radical leaves, and purplish or white, rarely yellowish, flowers. P.officinalis (P. vulgaris, Desf.). a common brookside plant of Europe, is known as the butter-bur or butler-dock, kettle-dock, cleat, boy-rhubarb, or pestilence-weed or pestilence-wort. For other species, see winter heliotrope (under heliotrope) and sweet coltsfoot (under coltsfoot).
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