It is a small perennial shrub with dull green leaves, bright blue flowers and is endemic to Australia.

Halgania cyanea is a small, usually dense perennial, growing up to 20–40 cm (7.9–15.7 in) high and a spreading habit up to 2 m (6 ft 7 in) wide.

The dull green leaves are narrow elliptic or linear shaped, 4–20 mm (0.16–0.79 in) long and 20–40 mm (0.79–1.57 in) wide, flattened, glandular hairs on the upper surface, toothed edges and almost sessile.

[2][3][4] Halgania cyanea was first formally described in 1840 by John Lindley and the description was published in A Sketch of the Vegetation of the Swan River Colony.

[7] Rough halgania occurs in a wide range of situations including sandy loam, sand plains, mallee and sand dunes in Western Australia, South Australia, Victoria and the Northern Territory, but is restricted to mallee communities in New South Wales.