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