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An aromatic perennial plant (Monarda didyma) native to eastern North America, having tubular scarlet flowers grouped in dense heads.
[So called because its leaves and flowers are used to make tea.]
Os•we′go tea′(ɒsˈwi goʊ)
a North American plant, Monarda didyma, of the mint family, having red tubular flowers.
[1745–55, Amer.; after the Oswego River in New York state]