Perennial plant of Europe and America having racemes of white or purplish flowers and intensely bitter trifoliate leaves,often rooting at water margin and spreading across the surface.

• 一种生于美洲和欧洲泥塘中的多年生植物，总状花序，花白色或带紫色，叶为三小叶、具强烈的苦味，常常扎根于水边并且蔓延于表面。