Perennials, 30–50 (–65) cm tall, forming loose to dense stands, with ±short-noded, creeping rhizome. Cataphylls 3–4; upper cataphyll 7–10 cm long, with 0–1 mm long awnlike blade, yellowish-brown, dull distally, glossy at base. Stem leafless, terete, firm, 1.5–2.5 mm thick, green, smooth or 40–60 very inconspicuous ridges when dry, without subepidermal sclerenchyma strands; pith in mature stems cobwebby and partly evanescent; epidermis cells uniform; vascular bundles in two indistinct rows. Inflorescence pseudolateral, mostly 1–2.5 cm long, dense; flowers 6–10, loosely aggregated, Lower bract (6–) 12–20 (–30) cm long, several times longer than inflorescence and 1/5–1/2 as long as stem. Bracteoles 1.5–2.5 mm long, ovate, ±acute. Outer tepals (5–) 6.5–7.5 mm long, conspicuously longer than inner ones and often unequal, narrowly lanceolate, acuminate-cuspidate with often reflexed tip; inner tepals acute to acuminate, all reddish-brown with greenish central band and very narrow scarious margin, often ±wholly castaneous. Stamens 6; anthers (0.7–0 1.0–1.5 mm long, equalling to 1.5× as long as 0.8–1.0 mm filaments; style 0.3–0.4 mm long; stigmas c. 0.7–1.5 mm long. Capsule triseptate, trigonous, oblong-ovoid, 5–6.5 mm long, shorter than or rarely equalling tepals, abruptly tapering to c. 0.5 mm mucro, dark brown. Seeds ovoid to broadly ellipsoid, (0.6–) 0.7–0.8 × c. 0.4 mm, faintly reticulate; appendages absent. 2n = 80, fide R.L.Taylor & G.A.Mulligan, Fl. Queen Charlotte Is. 2: 42 (1968).