What is "blodeuwedd"

Blodeuwedd or Blodeuedd , ( Middle Welsh composite name from blodeu 'flowers, blossoms' + gwedd 'face, aspect, appearance': "flower face"), is the wife of Lleu Llaw Gyffes in Welsh mythology. She was made from the flowers of broom, meadowsweet, and oak by the magicians Math and Gwydion, and is a central figure in the fourth branch of the Mabinogi.