Hypertext Webster Gateway: "Eupatorium"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Eupatorium \Eu`pa*to"ri*um\, 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.
From WordNet (r) 1.7 (wn)
Eupatorium
n : large genus of chiefly tropical herbs having heads of white
or purplish flowers [syn: {Eupatorium}, {genus Eupatorium}]
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