T: New South Wales, Dawsons Springs, Mt Kaputar National Park, 30 171 S, 150 101E, 1350 m, 17 Nov 1976, R.G.Coveny & Roy 8697; holo: NSW; iso: CHR.
Perennials, 35–165 (–210) cm tall, rhizomatous; rhizome stout, creeping; stems in dense rows. Stem leafless, terete, almost smooth, 1.5–5 mm diam., ±hard; ridges 25–90, indistinct; epidermis cells almost uniform; subepidermal sclerenchyma strands present, forming radial lamellae; pith of astericiform cells, continuous or interrupted at least in part of the stem. Cataphylls few, lax, abaxially yellow-brown to red-brown or blackish at base, adaxially golden brown to coppery. Lower bract 3–16 cm long, shorter than or exceeding inflorescence; sheath narrow. Inflorescence pseudolateral, 2.5–10 cm long, diffuse; flowers numerous, small, solitary or loosely clustered. Bracteoles ovate, c. 1 mm long, scarious to stramineous. Tepals lanceolate, acute, stramineous-brown, occasionally with darker tinge, with very narrow to broad membranous margins; outer tepals 1.4–2.5 mm long, longer than or equalling inner ones. Stamens 3. Capsule triseptate, obovoid to ellipsoid, 2–2.2 mm long, exceeding or equalling tepals, obtuse, not or shortly mucronate, golden brown. Seeds ±ellipsoid, c. 0.5–0.6 × c. 0.2–0.3 mm, apiculate, 15–20-striate, densely reticulate, pale brown; appendages absent.