Any of several perennial herbs of the genus Petasites in the composite family, native to northern temperate regions and having large basal leaves and dense clusters of usually whitish or purplish flower heads.是什么意思_Any of several perennial herbs of the genus Petasites in the composite family, native to northern temperate regions and having large basal leaves and dense clusters of usually whitish or purplish flower heads.在线翻译_英语_读音_用法_例句