any of various plants whose roots have been regarded as a remedy for snakebites, as the herb Aristolochia serpentariahaving a medicinal rhizome and rootlets, and the white-flowered Polygala senegahaving a medicinal root.
the root or rhizome of such a plant.
the North American bugbane.
a white eupatorium, Eupatorium rugosum.
a plant, Rauwolfia serpentina (or Rauvolfia serpentina), whose roots are the source of reserpine and other drugs.