Mace is a spice made from the bark of an evergreen tree called Myrtus communis, which comes in orange or yellowish-brown. The woody part grows near the root and contains oils that give it its strong spicy aroma with notes of clove, cinnamon, nutmeg and pepper. Allspice comes from a very similar species to myrtle – Pimenta dioica – but because allspice also has fragrant flowers (called pimentos) as well as berries at some point during their season, they are often confused for each other.