(n)low spreading tropical American shrub with long slender leaves used to make a mildly stimulating drink resembling tea; sometimes placed in genus Eupatorium, Syn.Ayapana triplinervis, Eupatorium aya-pana
(n)American herb having flat-topped clusters of small white flower heads; reputedly a cause of trembles and milk sickness; sometimes placed in genus Eupatorium, Syn.Eupatorium rugosum, Ageratina altissima, white sanicle
The Collaborative International Dictionary of English (GCIDE) v.0.53Collaborative International Dictionary (GCIDE)
n. [ NL., fr. Eupator, king of Pontus, said to have used it as a medicine. ] (Bot.) A genus of perennial, composite herbs including hemp agrimony, boneset, throughwort, etc. [ 1913 Webster ]