Mondo Grass
Ophiopogon japonicus, commonly referred to as mondo grass or mondo, is very similar to liriope but much smaller, growing 6 to 12 inches tall with 1/4-inch-wide leaves. Its fine texture makes it a good ground cover in tight spots
Mondo grass is not recommended for full sun locations because of leaf burn. A little shade allows it to retain a deep blue-green color. 'Silver Mist' is a variegated form with green-and-white leaf blades. There is also black mondo grass (O. japonicus 'Nigrescens') which has very dark foliage. This selection is more of a specimen plant and is slow to establish itself. Dwarf mondo (there are several dwarf selections) is tiny, growing only 3 inches tall. Many times dwarf mondo is used in cracks and crevices of walkways. Its low profile keeps it from interfering with your footing.