Luzula longiflora is a flowering plant in the rush family.

The tufted leaves are 5–35 cm long and 4–5 mm wide.

The inflorescences are 5–25 cm high and branched, with dense heads of numerous flowers subtended by leaf-like bracts.

[1] The plant is endemic to Australia’s subtropical Lord Howe Island in the Tasman Sea.

It occurs on ledges and in crevices on the upper slopes of Mounts Lidgbird and Gower at the southern end of the island.