any of a genus of plants of the primrose family with leafy stems and yellow or white flowers: genus Lysimachia
any of a genus of plants of the henna family including some with showy spikes of purple flowers: genus Lythrum
[intended as translation of Greek lysimacheios loosestrife (from Lysimachos, the name of its discoverer), as if it was from lysis act of loosing + machesthai to fight]