Lepechinia

In the UK this is a rarely grown group of plants, with around 3 or 4 available and  L. hastata from Hawaii being the most common. They are sage like, with scented leaves and tubular flowers. Hailing from the warmer areas of North and South America, they will do better in a sheltered garden position. 

In their native areas (mostly North America), Lepechinia species are visited by bumblebees, leaf-cutter bees and honeybees, and the same is probably true in gardens in the UK. The leaves are filled with volatile oils that serve to deter herbivores, including insects, from eating them as well as cooling the plants by 'sweating' the oils into the air.