| water shamrock | (n) 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, Syn. marsh trefoil, bogbean, bog myrtle, Menyanthes trifoliata, buckbean |
| bogbean | 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 |