The Collaborative International Dictionary
Spiked willow-herb
Willow-herb \Wil"low-herb`\, n. (Bot.) A perennial herb ( Epilobium spicatum) with narrow willowlike leaves and showy rose-purple flowers. The name is sometimes made to include other species of the same genus.
Spiked willow-herb, a perennial herb ( Lythrum Salicaria) with willowy leaves and spiked purplish flowers.