Creeping Lilyturf (Liriope spicata, 山麦冬).
It is distinguishable from similar liriope muscari by its rhizomatous roots and more humble flower spike, which does not grow much higher than its leaves. In Traditional Chinese Medicine, it is used nourishing Yin, and treating heartburn and unsteady nerves. It is also grown as groundcover or to prevent hillside erosion, but this one was growing on its own, wild.