Big Blue Lilyturf

Description:

Long, dark, slender grass-like leaves with tall spikes full of lavender flowers. This plant grows in clumps.

Habitat:

Full shade under avocado tree in backyard. This is native to east Asia. There have been reports that this species has naturalized in the wild near the Bay Area of California.

Notes:

"The roots, which often have fleshy tubers near their tip, are used in traditional Chinese medicine." - Wikipedia