Gahnia radula

About

Gahnia radula, commonly known as the thatch saw-sedge is a tufted perennial sedge native to south-eastern Australia. The leaves are long, flat and rough, with sharp edges. It has a distinctive brown inflorescence, which darkens to black. It grows to 50–100 cm in height, spreads through its rhizomes and is found in eucalypt forest and grassy woodland.

Summary from Wikipedia