redroot

noun

any of various plants with red roots, as

1. a small shrub (genus Ceanothus) of the buckthorn family
2. a marsh plant (Lachnanthes tinctoria) of the bloodwort family, with sword-shaped leaves and flat clusters of small, woolly, yellow flowers, found along the Atlantic coast of the U.S.
3. pigweed (sense )
4. bloodroot