Allspice is the dried, unripe berry of Pimenta dioica, a tall tropical evergreen of the myrtle family native to the Greater Antilles and Central America. Its English name is a marvel of misdirection: this is a single spice, not a blend, yet its warm aroma so uncannily marries the notes of clove, cinnamon and nutmeg that early English traders called it allspice. The illusion is real chemistry — its dominant essential-oil compound is eugenol, the very molecule that defines clove, rounded by woody and sweet-spicy notes that read as cinnamon and nutmeg. Used whole or ground, it is the backbone of Jamaican jerk, drives Caribbean stews and pickling brines, and turns up in Levantine spice mixes, Scandinavian baking and the warm-spice corner of pies and mulled drinks. The most prized berries come from Jamaica.