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Related to Willow-herb: Epilobium, Chamerion angustifolium


n.1.(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.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in classic literature ?
Beebe watched them, and watched the seeds of the willow-herb dance chorically above their heads.
They ran to get dry, they bathed to get cool, they played at being Indians in the willow-herbs and in the bracken, they bathed to get clean.
Larkspur, too, dries well, as do cornflowers, Sweet William, globe amaranth, love-in-a-mist, xeranthemum, rose bay willow-herb, mint, echinops, chamomile, anaphlis, sunray, feather flower, rudbeckia and foxglove.
It feeds mainly on willow-herb but will also eat the foliage of the fuchsia plant.