Lōose'strīfe, n.

(109), n. (Bot.) (a.) A plant of several species of the genus Lysimachia, having small, star-shaped flowers, usually of a yellow color. (b.) A plant of species of the genus Lythrum, having purple, or, in some species, crimson flowers. Gray.

False loosestrife, a plant of the genus Ludwigia, which includes several species, the most of which are found in the United States. — Tufted loosestrife, a plant of the genus Naumburgia (N. thyrsiflora), found in the northern parts of the United States and in Europe.