Source : Webster's Revised Unabridged Dictionary (1913)

Mayflower \May"flow`er\, n. (Bot.)
   In England, the hawthorn; in New England, the trailing
   arbutus (see {Arbutus}); also, the blossom of these plants.

Source : WordNet®

Mayflower
     n 1: the ship in which the Pilgrim Fathers sailed from England to
          Massachusetts in 1620
     2: low-growing evergreen shrub of eastern North America with
        leathery leaves and clusters of fragrant pink or white
        flowers [syn: {trailing arbutus}, {Epigaea repens}]