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
red.root n.（名词）An eastern North American bog plant(Lachnanthes caroliana) having red roots and woolly yellow flowers. 美洲血根草：一种北美东部根为红色、开有毛状黄色花朵的沼泽地区植物（卡罗来纳血根草） See pigweed 参见 pigweed See ceanothus 参见 ceanothus
