Cyperus blakeanus is a sedge of the family Cyperaceae that is native to Australia.
The perennial sedge typically grows to a height of 0.25to and has a caespitose habit. The plant blooms between April and May producing green-brown flowers.
In Western Australia it is found in the Kimberley, Pilbara, Goldfields-Esperance regions where it grows in red sandy-loamy soils.
It was first described in 1991 by Karen Wilson,[1] with the species epithet, blakeanus, honouring Stanley Thatcher Blake"who contributed so greatly to the taxonomic understanding of Australasian Cyperaceae".