Leaves 10 to 30 centimetres long, linear and bluish-green.
Flowers in loose, branched inflorescences on stalks up to 60 centimetres tall. The individual flowers are three-petalled, two centimetres across and blue or lavender, rarely white. Flowering sometimes initiated by heavy rain.
Fruit are egg-shaped capsules, about one centimetre long and contain black seeds.
Propagate from fresh seed.
Edible root. (Emerging Indigenous Crops of Australia John A. Considine)
Photo: Dick Harding