Holly

"Holly has a very long pre-Christian association with fertility, its sharp spines and red berries carried throughout winter were a powerful male symbol. Also, as an ancient magic charm against witches and house goblins, branches would be brought into the house and farm buildings during winter to protect inhabitants and livestock.
These two facets were easily accommodated by the new Christian beliefs, with the spines now representing the crown of thorns and the red berries the blood of Christ. Bringing sprigs into the house became traditional at Christmas, but elements of the old superstitions still linger.". On another point.. They're beautiful!