Lythrum salicaria. N.O. Lythraceae.
Synonym ► Purple Grass, Willow Strife.
Habitat ► By waterways; luxuriantly on river islands and banks.
Features ► Stem four- (sometimes six-) sided, up to four feet high. Leaves in pairs, threes or fours, nearly sessile, lanceolate, margins entire, two to five inches long. Flowers (July to September) large, reddish-purple, six to eight in rings round the stalk. Root woody.
Part used ► Herb.
Action ► Febrifuge, astringent, alterative.
Chiefly in feverish conditions with other herbs. Sometimes as an astringent in diarrhea. Used alone, simmer 1 ounce in 1 1/2 pints water for ten minutes. Dose, wineglassful as required.