1. 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
   "marsh trefoil flowers create a beautiful display in wetland areas";
   - water shamrock, buckbean, bogbean, Menyanthes trifoliata

Derived forms: marsh trefoils

Type of: aquatic plant, hydrophyte, hydrophytic plant, water plant

Part of: genus Menyanthes, Menyanthes

Encyclopedia: Marsh trefoil