Loosestrife

n.
  1. The name of several species of plants of the genus Lysimachia, having small star-shaped flowers, usually of a yellow color.
  2. Any species of the genus Lythrum, having purple, or, in some species, crimson flowers.
    3. False loosestrife ,
    a plant of the genus Ludwigia, which includes several species, most of which are found in the United States.
    Tufted loosestrife ,
    the plant Lysimachia thyrsiflora, found in the northern parts of the United States and in Europe.