T: Argentina, Mendoza, Tunuyán, Valle del Alto Tunuyán, 16 Feb 1934, A.Ruíz Leal 2140; holo: LIL46295.
Perennials to 15 cm tall, dwarf, densely caespitose, cushion-forming, subglabrous to sparsely hairy; rhizome ±erect, ±many-headed; stolons absent, with base covered with numerous brownish remains of leaf bases. Basal leaves rigid, glabrescent or ciliate, thick, canaliculate, 3–4 cm long, c. 1 mm wide, with ±obtuse to subobtuse tip and margins ±smooth; cauline leaves absent. Basal bract pale straw-brownish membranous, oblong-lanceolate, acute, ciliate, up to 1 cm long. Inflorescence spike-like, densely congested, terminal, cylindrical-ovoid,1.0–1.5 × c. 0.7–0.8 cm, of 2–6 few-flowered clusters, or rarely of 1–3 remote basal clusters. Bracteoles whitish scarious, ovate, acuminate, ciliate, to 1.5–1.8 mm long. Tepals glabrous, ±equal, pale straw-brown or membranous above, brown below, acuminate (subaristate), with inner tepal ±mucronate, usually 2.1–2.6 mm long. Stamens 3–5 (–6); anthers 0.4–0.6 mm long; filaments 0.4–0.6 mm long; style c. 0.1 mm long; stigmas to 1 mm long. Capsule ovoid, subacute, paler brown, shorter than perianth; capsule segments 1.6–1.8 × c. 1.0 mm. Seeds 1.0–1.1 mm long, c. 0.6 mm wide; appendage yellowish, c. 0.2 mm long, fibrillate.