Any member of the genus Ageratina of perennials and rounded shrubs from the sunflower family, growing mainly in the warmer regions of the Americas.

plural of snakeroot

Actaea racemosa, black cohosh / Sanicula spp.

The plant Ageratina altissima, native to eastern North America. / The plant Ayapana triplinervis, native to the tropical Americas.

(US) A vine native to the eastern US and historically used as a medicinal herb, Aristolochia serpentaria

plural of black snakeroot

plural of Virginia snakeroot