Eupatorium perfoliatum

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Noun

1.

Eupatorium perfoliatum - perennial herb of southeastern United States having white-rayed flower heads; formerly used as in folk medicinethoroughwort, agueweed, bonesetEupatorium, genus Eupatorium - large genus of chiefly tropical herbs having heads of white or purplish flowersherb, herbaceous plant - a plant lacking a permanent woody stem; many are flowering garden plants or potherbs; some having medicinal properties; some are pests