Willow-herb /(?)/

Wil·low-herb

Willow-herb

n.
  1. 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. (Bot.)

Phrases & Compounds
Spiked willow-herb
a perennial herb (Lythrum Salicaria) with willowy leaves and spiked purplish flowers.