What is "feverbush"

Allspice \All"spice`\, n. The berry of the pimento ( Eugenia pimenta), a tree of the West Indies; a spice of a mildly pungent taste, and agreeably aromatic; Jamaica pepper; pimento. It has been supposed to combine the flavor of cinnamon, nutmegs, and cloves; and hence the name. The name is also given to other aromatic shrubs; as, the Carolina allspice ( Calycanthus floridus); wild allspice ( Lindera benzoin), called also spicebush, spicewood, and feverbush.