- water shamrock, buckbean, bogbean, bog myrtle, marsh trefoil, Menyanthes trifoliata - 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
--1 is a kind of aquatic plant, water plant, hydrophyte, hydrophytic plant
--1 is a member of Menyanthes, genus Menyanthes