Purple Willow, or Purple Loosestrife, is a member of the Lythraceae family. It is indigenous to Europe. The flowering plant minus the roots and branch tips can be used in medicinal formulas. Purple Willow contains tannins, flavonoids, phthalides, pectin, resins, cholin, and salicarin. Purple Willow may have anti-inflammatory, astringent, and antibiotic effects.