Word Study
bogbean
CIDE DICTIONARY
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 bog myrtle , water shamrock and marsh trefoil . [WordNet 1.5]
For further exploring for "bogbean" in Webster Dictionary Online