(n)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, Syn.giant willowherb, rosebay willowherb, wickup, Epilobium angustifolium
n. (Bot.) (a) An American plant (Erechthites hiercifolia), very troublesome in spots where brushwood has been burned. (b) The great willow-herb (Epilobium spicatum). [ 1913 Webster ]