Labdanum is the amber note in perfumery, and it comes from a Mediterranean rockrose. Traditionally the resin was combed from the coats of goats that had grazed among the bushes. It smells warm, sweet and leathery, closest of any natural material to ambergris. Over 200 compounds have been identified in it, led by labdane diterpenes and viridiflorol. Testing of the essential oil from the same plant found it holds back bacteria and fungi.^[1]