Perennials usually 45–85 cm tall, loosely caespitose, ciliate; rhizome ascending, often with fibrous cover; stolons ascending, with base covered with brownish cataphylls. Basal leaves usually (15–) 20–30 cm long, usually 3–4 (–5) mm wide; cauline leaves 3–5, to 30 cm long, often exceeding inflorescence. All leaves acute, papillose-serrate (basal leaves often ±smooth). Lower bract herbaceous, usually up to 10–12 cm long, longer than inflorescence. Inflorescence decompound, typically 3–5 × 3–5 cm; main branches short, each with a ±dense anthelate 5–12 (–20)-flowered cluster. Bracteoles ovate to ovate-lanceolate, whitish-scarious, c. 1.5 mm long, subglabrous to sparsely ciliate. Tepals unequal (outer tepals shorter by c. 1.5 mm), glabrous, lanceolate, 4.2–5.2 (–5.5) mm long, snow-white, becoming slightly pale straw-white, or rarely suffused purplish. Stamens 6, longer than outer tepals; anthers 1.8–2.2 mm long, turning brownish after dehiscence; filaments 1.5–1.9 mm long; style 2.2–2.6 mm long; stigmas 1.0–1.3 mm long. Capsule brown, shining, acuminate and subtrigonous above, mucronate; capsule segments usually 2.0–2.4 mm long including a mucro c. 0.5 mm long and c. 1.5 mm wide. Seeds ellipsoidal, dark castaneous-brown, 1.2–1.4 mm long including a distinct apical protuberance 0.2–0.3 mm long and c. 0.7 mm wide; appendage yellowish, c. 0.1 mm long, fibrillate. 2n=12, fide H.Nordenskiöld, Hereditas 37: 328–329 (1951); Druskovic, Int. Organ. Pl. Biosyst. Newslett. 24: 14 (1995).