A perennial herbaceous plant (Epilobium angustifolium or Chamaenerion angustifolium) in the willowherb family Onagraceae.
User Defined Definitions
"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 "
"an American weedy plant with small white or greenish flowers"