Clove is the dried, unopened flower bud of Syzygium aromaticum, a tropical evergreen of the myrtle family whose tiny nail-shaped buds carry one of the most intense, concentrated aromas in the entire spice cabinet. Native to a handful of volcanic islands in eastern Indonesia, each rust-brown bud is so loaded with oil that it leaves an oily smear when pressed with a fingernail, and smells warm, sweet, deeply phenolic and faintly medicinal — the unmistakable note of mulling spice, pomanders and pumpkin pie. A little goes a very long way: a single bud can perfume a whole pot, and on the tongue clove brings a numbing, tingling warmth before its sweetness. It anchors garam masala, Christmas baking, biryani and Sichuan five-spice alike.