Source : WordNet®

English hawthorn
     n 1: European hawthorn having deeply cleft leaves and bright red
          fruits; widely cultivated in many varieties and often
          grown as impenetrable hedges; established as an escape
          in eastern North America [syn: {Crataegus monogyna}]
     2: thorny Eurasian shrub of small tree having dense clusters of
        white to scarlet flowers followed by deep red berries;
        established as an escape in eastern North America [syn: {whitethorn},
         {may}, {Crataegus laevigata}, {Crataegus oxycantha}]