n. a perennial plant of Europe and America (Menyanthes trifoliata) having racemes of white or purplish flowers and intensely bitter trifoliate leaves; often rooting at the water margin and spreading across the surface; -- called also
n. a perennial plant of Europe and America (Menyanthes trifoliata) having racemes of white or purplish flowers and intensely bitter trifoliate leaves; often rooting at the water margin and spreading across the surface; -- called also