Lepidosperma avium, commonly named the central Australian rapier-sedge and the desert rush, is a rare species of sedge found in the Everard Ranges of remote northern South Australia and neighbouring parts of the Northern Territory.

[1][2][3] Lepidosperma avium was first scientifically described by Karen L. Wilson in 1994, from the Everard Ranges, which the species is believed to be endemic to.

[6] Lepidosperma avium forms clumps, between 1.2 and 2.4 metres (3.9 and 7.9 ft) tall.

The stems are stiff, hairless, and smooth, less than a centimetre thick, with small lines and grooves all over the surface.

[4][3] L. avium occupies a "petrophilous (rock-loving)" ecological niche.