Perennials, (6–) 13.5–35 cm tall, with stems single, distant, stiffly erect; rhizomes stout, creeping, long-noded. Cataphylls sheathing, with upper ones with setaceous points, whitish-brown, dull. Cauline leaf single, stiff, erect, linear; tip obtuse, usually 1/2 of stem length, semicircular to cylindric in T.S., canaliculate, bitubular, with thin membranous longitudinal septum and weak transverse septa (septa not visible externally), to 1.7 mm wide; auricles rounded, with free part 0.8 × 0.9 mm, stramineous, membranous. Lower bract extended into leafy point at least twice capitulum length. Inflorescence 8–13 (–24)-flowered, 1.4–2.0 cm diam. Tepals narrowly lanceolate, acute, ±equal, 4.7–6.7 mm long, creamy white. Stamens 6; anthers completely exserted at maturity, 1.7–2.5 mm long; filaments elongating, to c. 5–6 mm long; ovary ellipsoid, 2.0–4.2 mm long; style 1.3–2.7 mm long; stigmas 1.0–2.2 mm long. Capsule ellipsoid-trigonous, 3.0–4.1 mm long, abruptly contracted into partly exserted 1.5–2 mm mucro. Seeds orange-brown, to 0.3 mm wide, 0.6–0.8 mm long, or c. 0.9–1.0 mm including two subequal appendages c. 0.1–0.2 mm long.