Perennials, densely caespitose; rhizome horizontal, rarely ascending, with internodes very abbreviated; stems crowded in dense rows, usually 10–30 cm tall; lower cataphylls ovate to rounded, greyish stramineous, wrinkled, with blade reduced to mucro 0.3–0.7 mm long; upper cataphylls usually up to 5–6 cm long, obtuse above, straw-brown, rarely reddish brown, slightly shining to dull, with blade fragile, subulate, usually to 1.5 cm long; shoots erect, extravaginal. Leaves terete, much exceeding stems, ±rigid, ±striate, bright green, ±shining above, usually 20–35 cm long, 0.6–0.9 mm in diam., acute, ±papillose near apex; basal leaves 1–3 per shoot; cauline leaves usually single, with long sheath. Bract(eole) solitary, ovate, obtuse, membranous, 2.0–2.5 mm long. Tepals unequal, erect, entire, acuminate to subaristate, straw-brown to stramineous, margins ±membranous; outer tepals usually 1.7–2.7 mm long, inner tepals usually 1.3–1.9 mm long, up to 1.5 mm wide. Stamens 6; anthers c. 5 mm long, apiculate; filaments c. 1.7–2.0 mm long; connective prominent; mucro 0.7–0.9 mm long; style dark, c. 2.5 mm; stigmas dark, c. 5 mm. Capsule oblong-ellipsoidal, subacuminate, mucronate, usually 8–10 mm long, pale brown to castaneous brown. Seeds straw-brown, oblong ellipsoidal, c. 0.9–1.1 × c. 0.6 mm; seed-coat distinct; overall length 2.3–2.7 mm including unequal appendages c. 0.4–0.6 mm and c. 0.8–1.1 mm long.