Japanese jacinth is an East Asian plant that grows from an underground bulb and is grown as an ornamental in the United States. Its slender stalks carry small pink-purple flowers after much of its spring foliage has faded.
Lilyturf keeps a dense clump of dark green, strap-like leaves while it blooms and later makes shiny black berries. Japanese jacinth often flowers after its spring leaves fade and produces dry capsules instead.
Why they get mixed upBoth can show upright purple flower spikes above narrow, grasslike leaves.