A North American plant, Sanguinaria canadensis, of the poppy family, which has a red root and sap and a single white flower in early spring.
Any of several plants with red roots, such as the New Jersey tea (Ceanothus americanus), the gromwell (Lithospermum arvense), the bloodroot (Sanguinaria canadensis), and Lachnanthes caroliniana (syn. Lachnanthes tinctoria).