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noun fire·weed \-ˌwēd\

Definition of fireweed

  1. :  any of several plants that grow especially in clearings or burned districts: as a :  a weedy annual composite (Erechtites hieracifolia) of eastern North America having flower heads of whitish tubular disk flowers enveloped by green bracts b :  a tall perennial (Epilobium angustifolium) of the evening-primrose family that has long spikes of pinkish-purple flowers and is an important honey plant in some areas —called also willow herb

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