Chamerion angustifolium (L.) Holub

Chamerion angustifolium (L.) Holub. Chamaenerion angustifolium is a perennial herbaceous flowering plant in the willowherb family, Onagraceae. It is known in North America as fireweed and in the British Isles as both fireweed and rosebay willowherb. It is also known by the taxonomic synonyms Chamerion angustifolium and Epilobium angustifolium. It is native throughout the temperate Northern Hemisphere, including large parts of the boreal forests.