From Wikipedia - "Another common aspect of the festival which survived up until the early 20th century in Ireland was the hanging of May Boughs on the doors and windows of houses and the erection of May Bushes in farmyards, which usually consisted either of a branch of rowan/caorthann (mountain ash) or more commonly whitethorn/sceach geal (hawthorn) which is in bloom at the time and is commonly called the 'May Bush' or just 'May' in Hiberno-English. Furze/aiteann was also used for the May Boughs, May Bushes and as fuel for the bonfire. The practice of decorating the May Bush or Dos Bhealtaine with flowers, ribbons, garlands and colored egg shells has survived to some extent among the diaspora as well, most notably in Newfoundland, and in some Easter traditions observed on the East Coast of the United States."
