T: Spain, Pyrenees, Estanys d'En Gaït, Circ d'En Gaït, 2500 m, Aug 1949, P.Montserrat; holo: BCF.
Perennials (10–) 12–15 (–25) cm tall, loosely caespitose, ±glaucous-green, subglabrous; rhizome creeping to ascending; stolons ascending, covered with purplish brown cataphylls or with sparse fibrous cover. Basal leaves usually (3–) 4–7 (–9) cm long, (3–) 4–5 (–6) mm wide; cauline leaves usually 3, usually 2–4 (–6) cm long. All leaves subacute to subobtuse; margins distinctly papillose-serrulate. Lower bract ±brownish-membranous, 1.0–1.5 (–2.0) cm long, shorter than inflorescence. Inflorescence decompound, corymbiform; main branches thin, straight to arcuate; lower branches often patent, sometimes erect, each with dense glomeruliform (5) 10–15 (25)–flowered cluster, with one cluster often larger, subsessile. Bracteoles ovate, c. 1.5 mm long, transparent-scarious, ±ciliate. Tepals unequal, ±oblong-lanceolate, glabrous, straw-yellow, becoming ±dirty yellow, with broad membranous margins; inner tepals 2.8–3.2 mm long; outer tepals shorter, c. 2.5–2.7 mm long. Stamens 6; anthers 1.1–1.8 mm long; filaments 0.3–1.1 mm long, distinctly elongating during flowering (anther/filament ratio thus changing); style (0.9–) 1.0–1.3 mm long; stigmas 0.5–0.8 mm long. Capsule oblong-ovoid, acuminate, mucronate, deep castaneous-brown, shining; capsule segments 2.4–2.8 × 1.4–1.5 mm long including a mucro 0.2–0.3 mm long. Seeds oblong-ovoid, paler brown, 1.0–1.3 mm long including a paler apex c. 0.2 mm long and 0.7–0.8 mm wide; appendage c. 0.1 mm, fibrillate. 2n=12, fide H.Nordenskiöld, Hereditas 37: 328–329 (1951).