feverfew : Idioms & Phrases
american feverfew
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noun stout perennial herb of the eastern United States with whitish flowers; leaves traditionally used by Catawba Indians to treat burns
Parthenium integrifolium; wild quinine; prairie dock.
WordNet
bastard feverfew
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noun tropical American annual weed with small radiate heads of white flowers; adventive in southern United States
Parthenium hysterophorus.