Perennials, usually 15–30 cm tall, loosely caespitose, subglabrous to ±glabrous; rhizome creeping to ascending; stolons usually ascending. Leaves of sterile shoots usually 10–15 cm long, (4–) 5–7 (–10) mm wide; leaves at stem base usually short, 2–5 cm long; cauline leaves 3–4, usually 3.5–6.0 cm long, 4.5–8.0 mm wide. All leaves with papillose-serrulate margins; apex acute. Lower bract ±herbaceous, to 2–3 cm long, much shorter than inflorescence. Inflorescence ±loose, ±nodding to suberect, ±divaricate, usually 5–9 × 3–6 cm, usually more than 35–50-flowered; flowers usually borne singly. Bracteoles ±ovate, membranous, often suffused brownish, c. 1.5–2.0 mm long, ciliate. Tepals equal, glabrous, ±lanceolate, acuminate, 2.4–3.0 mm long, deep to dark castaneous-brown, with margins indistinct or narrow, paler brownish. Stamens 6; anthers (1.1–) 1.4–1.6 (–2.1) mm long, up to 10 times as long as filaments; filaments 0.2–0.3 mm long; style 0.5–0.9 mm long; stigmas 1.0–1.5 mm long. Capsule ±ovoid, acute, shortly rostrate, dark brown, usually slightly exceeding perianth; capsule segments 2.5–2.9 × c. 1.4–1.6 mm. Seeds ±oblong-ovoid, c. 1.2–1.4 mm long, c. 0.7 mm wide; appendage indistinct; base fibrillate. 2n=12 [AL], fide H.Nordenskiöld, Hereditas 37: 330–331 (1951).