Perennials, densely caespitose; rhizome stout, branched, ascending or short with internodes very abbreviated; stem 15–25 (–33) cm long, c. 1 mm in diam.; cataphylls 3–4 (–5), obtuse, pale brown with blade mucroniform and 0.3–1.5 mm long; cauline leaf usually single; auricles narrow, distinct; sterile shoots usually single-leaved. Leaves overtopping stem; apex acute, smooth. Bracteoles 2, membranous, obtuse, broadly rounded, c. 1.0–1.5 mm long. Tepals linear-lanceolate, acuminate, scarious to stramineous, unequal; outer tepals 1.6–2.3 cm long; inner tepals c. 1.3–1.5 cm. Stamens 6; anthers 4–7 mm long; filaments (0.7–) 1.2–1.5 mm long; ovary c. 3 mm long; style c. 3 mm long; stigmas c. 5 mm long. Capsule ellipsoid-trigonous, acuminate, brown, shining, 1.1–1.5 cm long. Seeds 1.0–1.1 mm long, or 4.0–5.0 mm long including two whitish subequal tail-like appendages 1.2–1.5 mm and 1.5-1.7 mm long.
Confined to the southern part of C Chile and Neuquén and Río Negro in SW Argentina. 85: AGS, CLC.
85. ARGENTINA SOUTH: Río Negro, Cerro López, 1700 m, A.Burkart (SI 6177). CHILE CENTRAL: Baños de Chillán, Aguas Calientes, 2200 m, Mar 1927, E.Werdermann 1302 (K, S).
Peaty grassland, bogs, up to 2200 m.