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The Collaborative International Dictionary
False loosestrife

Loosestrife \Loose"strife`\ (l[=oo]s"str[imac]f`), n. (Bot.)

  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.
    --Gray.

    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.
    --Gray.