or Flea-bane, in botany, a genus of the syngenesia polygamia superflua clas. The receptacle is naked; the pappus is simple; the calyx is roundish and imbricated; and the rays of the corolla are divided into three segments. There are nineteen species, only one of which is a native of Britain, viz. the squarrofa, or plowman's spikenard.