Teucrium is a genus of perennial plants, of the family Lamiaceae. Common names for this genus include germanders. These species are herbs, shrubs or subshrubs. They are most common in Mediterranean climates. A unique feature of this genus among Lamiaceae is that the flowers completely lack the upper lip of the corolla, although it's somewhat reduced also in other genera (Ajuga among them). Several are used as food plants by the larvae of some Lepidoptera species including the Coleophora case-b… (More on Teucrium)