Lilyturf or blue lily turf is a tuberous, grass-like perennial which grows 12-18" tall and features clumps of glossy, dark green leaves that arch towards the ground (1" wide). Clumps of Liriope will slowly expand by tuberous roots, but do not spread aggressively. Upright, showy flower spikes with tiered spirals of dense, violet-purple flowers; flower in late summer. Flowers give way to blackish berries which often stay on the plant through winter.