T: Australia, Victoria, 1 mile [1.6 km] W of Rosedale, swamp between Princess Highway and Latrobe River, 22 Jan 1957, N.A.Wakefield 4835; holo: MEL; iso: K, NSW.
Perennials, 140–460 cm tall, dioecious, densely caespitose; rhizome short-noded. Stem leafless, terete, 4–9 mm diam., hard below, softer above, mid-green; ridges 100–200, dense, indistinct; dorsal epidermis cells not enlarged; pith interrupted, sometimes continuous above, of astericiform cells. Cataphylls few, lax, abaxially dull pale to dark yellow-brown distally, deep castaneous-brown to dark red-brown or black and glossy at base, adaxially golden brown to silvery stramineous. Inflorescence 7–30 mm long, diffuse; flowers numerous, solitary or loosely clustered. Lower bract 20–60 cm long, exceeding inflorescence. Tepals subequal, lanceolate, stramineous-brown, occasionally red-tinged, with ±broad membranous or yellowish margins; outer tepals 1.5–2.5 mm long, longer than or occasionally equalling inner ones; inner tepals often subacute, with distally broader scarious margin. Stamens 6; anthers 0.6–0.8 mm long; filaments c. 0.3 mm long; female flowers with 6 staminodes; style c. 0.1–0.2 mm long; stigmas to 1.5 mm long. Capsule triseptate, ellipsoid to obovoid, c. 1.8–2.2 mm, usually exceeding or less often equalling perianth, obtuse, not or shortly mucronate, dark golden brown. Seeds ovoid, c. 0.5–0.6 × 0.30–0.35 mm, minutely apiculate, faintly striate, densely reticulate, pale brown; appendages absent.