Which grasses dominate dry grasslands in Australia?

In the extensive arid regions of Australia, dry grasslands are primarily dominated by species of spinifex grasses, specifically those belonging to the genera Plectrachne and Triodia. These grasses are notable for forming characteristic hummocks by trapping windblown sand at the bases of their tussocks.1

In addition to these, Astrebla, commonly known as Mitchell grass, is prevalent in seasonally arid areas, particularly on cracking clay soils in the eastern parts of the continent. While these species dominate, other grasses may be present as subordinates or may dominate in localized spots.1