Ajuga, sometimes called bugleweed, is a shade-loving ground cover from the mint family. It spreads rapidly, forming a dense mat of leaves that range from dark green to deep, bronze-like purples. In the spring, different varieties produce attractive blue, pink, or even white flowers. It does not tolerate heavy foot traffic, making it ideal for shady, moist areas under trees where turf will not grow. Be careful to contain it with solid edging materials, however, as it can quickly invade lawn areas.