fireweed

Noun fireweed has 2 senses

• fireweed(n = noun.plant) epilobium angustifolium, giant willowherb, rosebay willowherb, wickup - 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;
is a member of epilobium, genus epilobium
is a kind of willowherb

• fireweed(n = noun.plant) erechtites hieracifolia - an American weedy plant with small white or greenish flowers;
is a member of genus erechtites
is a kind of weed