Lepidosperma longitudinale Labill.

Culms hollow or with a very loose pith, distinctly convex on both sides, usually 1–1.5 m high. Leaves shorter than the culm, c. 1 cm wide. Panicle loose, 12–25 cm long; the secondary rhachis not usually obscured by the spikelets. Glumes lanceolate. Nut shining, brownish, surrounded by the lanceolate to narrow-deltoid perianth scales. Widespread. Swamps