Eleocharis sphacelata, commonly known as tall spikerush, is a sedge of the family Cyperaceae that is native to Australia[1] and New Zealand.

[2] The erect rhizomatous perennial herb to grass-like sedge typically grows to a height of 1 to 2 metres (3.3 to 6.6 ft).

It blooms between February and October producing white flowers.

[1] It is found in and around lagoons and in and swampy areas in coastal parts of the Kimberley, South West, Great Southern and Goldfields-Esperance regions of Western Australia where it grows in black muddy soils.