n.perennial woodland native of North America having a red root and red sap and bearing a solitary lobed leaf and white flower in early spring and having acrid emetic properties; rootstock used as a stimulant and expectorant
N（名词）
a North American papaveraceous plant, Sanguinaria canadensis, having a single whitish flower and a fleshy red root that yields a red dye 血根草 (Also called red puccoon)