"fireweeds" in the noun sense
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
2. fireweed, Erechtites hieracifolia
an American weedy plant with small white or greenish flowers
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License