Liriope, also commonly called border grass is not actually a grass but a member of the lily family, a fact that inspires another of its common names, lilyturf. The dark green, ribbonlike foliage grows in length from 10 to 18 in (25-46 cm) and then recurves toward the ground to form rounded clumps. As the clumps mature they merge into a continuous carpet that resembles a plot of shaggy lawn grass. In summer, spikes of showy purple, flowers rise from the center of clumps. Flowers are followed by p ...