Dianella caerulea

Dianella caerulea, commonly known as the blue flax-lily, blueberry lily, or paroo lily, is a perennial herb of the family Asphodelaceae, subfamily Hemerocallidoideae, found across the eastern states of Australia and Tasmania. It is a hardy plant, growing to a height and width of around 1 metre with grass-like strappy leaves. Blue flowers in spring and summer are followed by indigo-coloured berries. It adapts readily to cultivation and is commonly seen in Australian gardens and amenities plantings....read more on Wikipedia.