Cyathochaeta teretifolia

Cyathochaeta teretifolia is a sedge of the family Cyperaceae that is native to Australia. The perennial rhizomatous sedge typically grows to a height of 2 metres (6.6 ft) and a width of around 1 m (3.3 ft) with a clumped habit and produces brown flowers. In Western Australia it is found along the margins of creeks and in swamps mostly along the coast in the Peel, South West and Great Southern regions where it grows in sandy-clay soils....read more on Wikipedia.