Holly is called Kristtorn in Norway, because of the belief that the crown of thorns placed on the head of Christ was formed from spiny holly leaves.
Holly has been part of the winter holiday tradition since Druids first hung it in their homes to welcome forest spirits.
Under good conditions, holly trees can live to be 300 years old, and still produce holly.
English custom decrees that honey bees be wished a Merry Christmas by attaching a sprig of holly to each hive.
There are more than 500 subspecies of holly worldwide.
Romans exchanged gifts of holly branches with the Greeks as a symbol of friendship.