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Definition of Rosebay willowherb
1. Noun. 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.
Exact synonyms: Epilobium Angustifolium, Fireweed, Giant Willowherb, Wickup
Group relationships: Epilobium, Genus Epilobium
Generic synonyms: Willowherb
Group relationships: Epilobium, Genus Epilobium
Generic synonyms: Willowherb