Dianella

Dianella tasmanica ( Tasman Flax Lily )
A fast rhizome-spreading, densely clumping perennial.
The narrow lance-shaped leaves, up to 3.5 feet tall, are mid-green.
The attractive blue berries appear fall into winter.
Hardy zones 8 to 10 in partial shade ( full sun in cool summer coastal regions ) in consistently moist to wet, fertile soil.

'Variegata' ( Variagated Flax Lily )
A fast rhizome-spreading, densely clumping perennial.
The narrow lance-shaped leaves, up to 3.5 feet tall, are boldly striped and margined white.
The attractive blue berries appear fall into winter.
Hardy zones 8 to 10 in partial shade ( full sun in cool summer coastal regions ) in consistently moist to wet, fertile soil.

* photos taken on Jan 2011 @ Deerfield Beach Arboretum, Florida