L.A.S.Johnson in J.M.Black, Fl. S. Austral. , ed. 3, 1: 325 (1978)
T: Australia, New South Wales, Northbridge, Sailors Bay, 5 Dec 1959, L.A.S.Johnson; holo: NSW48976
Perennials 40–145 cm tall; rhizome horizontal, short-noded. Stems densely crowded in groups or dense rows, terete, 1.2–3 mm diam., ±hard, yellow-green; ridges 35–80, ±distinct; dorsal epidermis cells slightly enlarged; subepidermal sclerenchyma strands present, forming radial lamellae; pith continuous, of astericiform cells. Cataphylls few, ±lax, abaxially yellow to yellow-brown and slightly glossy distally, dark yellow-brown and glossy at base, adaxially silvery stramineous. Lower bract 4–30 cm, exceeding inflorescence; sheath narrow. Inflorescence pseudolateral, 2–12 cm long, diffuse, initially sometimes reddish, later stramineous-brown; flowers numerous, solitary or loosely clustered. Bracteoles ovate, to c. 1 mm long, acute, scarious. Tepals ±lanceolate, stramineous-brown often with darker bands on each side of midrib, with broad membranous margins; outer tepals 1.5–2.2 mm long, longer than or equalling inner ones, acute to acuminate; inner tepals subobtuse to acute, often ±mucronate. Stamens 3; anthers 0.6–0.7 mm long; filaments c. 0.4 mm long; style c. 0.1 mm long; stigmas to 1 mm long. Capsule triseptate, subtrigonous, ellipsoid to ovoid, 2.3–2.8 mm long, exceeding perianth, obtuse, not or shortly mucronate, dark golden brown. Seeds narrowly oblong-ovoid, c. 0.35–0.45 × c. 0.2 mm, brown to pale brown, apiculate, c. 16–20-striate, densely reticulate; appendages absent.