Dianella revoluta, commonly known as the Black-anther Flax-lily, Blueberry Flax-lily or Spreading Flax-Lily, is a perennial herb of the family Asphodelaceae, subfamily Hemerocallidoideae, found across the eastern states of Australia and Tasmania.

It was first described in 1810 by Robert Brown.

This is part of the genus Dianella. Estimates of the number of Dianella species range from 20 to more than 40.