Noun fireweed has 2 senses
  1. fireweed, giant willowherb, rosebay willowherb, wickup, Epilobium angustifolium - tall North American perennial with creeping rootstocks and narrow leaves and spikes of pinkish-purple flowers occurring in great abundance in burned-over areas or recent clearings; an important honey plant
    --1 is a kind of willowherb
    --1 is a member of Epilobium, genus Epilobium
  2. fireweed, Erechtites hieracifolia - an American weedy plant with small white or greenish flowers
    --2 is a kind of weed
    --2 is a member of genus Erechtites
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