button grass

Etymology
From.

Noun

 * 1)  Any of several grasses with round or globular flower heads; especially, a tussock-forming sedge especially of western Tasmania, forming distinct plains; and , an annual grass of mainland Australia.
 * 2) * 2004,, In Tasmania, Harvill Press, p. 73:
 * Button-grass plains grew in peaty soil to the water's edge.
 * Button-grass plains grew in peaty soil to the water's edge.